PRICES

Full week – €280 / 547.63 BGN

Early booking price (until 31.05.2026) – €255 / 498.73 BGN

Second child from the same family / returning client* – €260 / 508.51 BGN

Second and each additional week (valid for second child / returning client) – €260 / 508.51 BGN

“Bring a Friend” discount – when registering at least three children for the same period – €260 / 508.51 BGN

One day – €61 / 119.31 BGN

The listed prices are valid for a minimum group of 15 children.

The program may be carried out with a smaller group for an additional fee.

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What the prices include:

• Morning exercise;
• Science workshops, experiments, games, and creative activities with Bio Games;
• Sport climbing sessions on bouldering walls and a high climbing wall;
• Mountain activities and light hiking;
• Orienteering activities;
• Rope challenges / Alpine zipline over a river;
• Two fruit snacks per day;
• Transport: Sofia – Vitosha Nature Park – Sofia;
• Representatives from Machirski Sport;
• Representatives from Bio Games;
• “Tourism in Bulgaria” insurance.

!BONUS – includes “Trip Cancellation Insurance”, valid for 5-day packages, in case there are at least 10 calendar days remaining before the start of the selected week.

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What the prices do NOT include:

• Personal expenses;
• Lunch.

We offer a hot lunch from Ofeliite Hut – see sample menu “Ofeliite Hut”.

Prices:

• Children’s menu per day – €14.00 / 27.38 BGN
• Adult (16+) menu per day – €17.00 / 33.24 BGN

*In case of an increase in fuel prices or entrance fees, Machirski Sport reserves the right to adjust the program price, which will be agreed with the CLIENT.

Sample Daily Program

08:30 am – Departure from Sofia. Arrival at Ofeliite Base, Vitosha Nature Park.

09:15 am – 10:00 am – Morning exercise and a fruit snack.

10:00 am – 12:00 pm – Science workshop with Bio Games.

Every Wednesday – “English Wednesday” – the workshop is conducted in English! For the younger age group it is in the form of a game, with selected English words.

12:00 pm – 01:00 pm – Lunch time.

01:00 pm – 03:00 pm – Activities with Machirski Sport – hiking / sport climbing / rope challenges / mountaineering activities!*

03:00 pm – 03:30 pm – Afternoon snack.

03:30 pm – 04:30 pm – Games and sport climbing activities.

04:30 pm – Departure for Sofia.

05:30 pm – Arrival at the final stop: “Vasil Levski” National Stadium.

• For children who sleep in the afternoon:

Our base has all the facilities for a wonderful afternoon nap. We also have a hammock area where children can sleep in the shade and fresh air.

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Program by weeks

15.06–19.06.26

Large group, 7+ years: Natural Phenomena:

Monday – “Magical Magnetism: Aurora Borealis and the Earth’s Poles”: Children will take part in a series of magnetism experiments and a compass experiment. At the end, each child will make their own compass as a souvenir from the workshop.

Tuesday – “Electricity: Lightning and Electricity from Fruits”: Children will learn what electricity is and what it is generated from in nature. They will create an electric circuit using fruits and have fun.

English Wednesday  – “The Terrifying Tornado”: During this workshop children will take part in a pressure and temperature experiment. After that they will make their own tornado in a bottle. Each child will take their own tornado as a souvenir. *This workshop will be conducted in English and Bulgarian.

Thursday – “Avalanches and How to Survive Them”: Children will learn what causes avalanches, what “gravity”, “mass” and “slope” are. They will simulate an avalanche using a mountain model and artificial snow. Each child will make a clay mountain.

Friday – “Invisible Forces”: Children will take part in several experiments and will discover what force is and what types of forces exist. At the end each child will make a parachute as a souvenir.

 

Small group, 4–6 years: A journey from the Solar System to Earth:

Monday – “The Solar System”: Children will learn more about the Solar System from our fun scientist. After that they will take part in a scavenger hunt game to find parts of the Solar System. At the end each explorer will make their own Solar System as a souvenir.

Tuesday – “Marine World”: In this workshop children will learn more about the rich marine world and the animals in it. At the end each child will make a sea animal as a souvenir.

English Wednesday – “Animals of Vitosha”: Children will go on an expedition to find animals and plants from Vitosha and will learn interesting facts about them. Each child will make a fox from natural materials. *The leader will present selected English words from the workshop through a game-based approach.

Thursday – “Little Hunters: Small Wild Cats”: During the workshop we will learn about the history of domestic cats and the stories of the smallest wild cats in the world. We will learn more about their superpowers. At the end each participant will make a cute small wild cat from natural materials.

Friday – “South America and the Maya – Chocolate and Cocoa”: Children will take part in an expedition to discover traces of the “history of chocolate”. They will take part in a role-play game to identify different tastes. Each child will make and consume cocoa according to an ancient Aztec recipe.

 

22.06–26.06.26

Large group, 7+ years: Around the World in One Week:

Monday – “South America and the Maya – Chocolate and Cocoa”: Children will take part in an expedition to discover traces of the “history of chocolate”. They will take part in a role-play game to identify different tastes. Each child will make and consume cocoa according to an ancient Aztec recipe.

Tuesday – “Adventure in Egypt – Mummification”: Children will take part in logical and competitive games to discover a treasure and solve a mystery from ancient Egypt. They will learn more about ancient Egyptian animal gods and how Egyptians mummified their dead. Each child will make a fruit mummy as a souvenir.

English Wednesday – “Animals of Vitosha”: Children will go on an expedition to find animals and plants from Vitosha, solve mysteries and learn interesting facts about them. Each child will make a fox from natural materials. *This workshop will be conducted in English and Bulgarian.

Thursday – “The Mariana Trench”: Today scientists know more about Mars than about the deepest place in the ocean – the Mariana Trench. We invite all junior explorers on an ocean adventure! They will discover which animals live there through a trail expedition. Children will take part in experiments and learn through active learning how humans survive there. Each child will make an animal from the deepest place on Earth.

Friday – “Surviving the Himalayas”: How do some animals survive on the highest peaks on Earth? Which animals are they? Join us to find out and take part in a role-play game. Each child will make a mountain goose as a souvenir.

 

Small group, 4–6 years: Prehistoric Times:

Monday – “Sharks”: Children will discover interesting shark species and learn more about them through games with our scientist. Each child will make a shark badge.

Tuesday – “Make a Fossil”: Which dinosaurs lived in Bulgaria? Are there dinosaurs in Bulgaria today? Children will take part in an expedition to discover dinosaurs that lived on the territory of Bulgaria. Each child will make a fossil as a souvenir.

English Wednesday – “Dragons and Giant Serpents”: An ancient people discover the remains of a huge serpent that lived alongside dinosaurs! And create legends about terrifying fire-wrapped dragons. Did this serpent really exist? Join us to uncover the mystery. Each child will make a reptile and a dragon. *The leader will present selected English words through a game-based approach.

Thursday – “World of Dinosaurs”: Children will discover the most interesting dinosaurs and learn more about them. Each child will make a T-Rex foot as a souvenir.

Friday – “Ice Age”: Children will take part in an expedition to discover Ice Age animals and learn interesting facts about them. Each child will make an edible-material toy and have lots of fun!

 

20.07–24.07

Large group, 7+ years: Human Body:

Monday – “Cells and DNA”: Children will see cells under a microscope and learn more about cells and DNA. Participants will isolate DNA from fruit. Each child will make an edible cell.

Tuesday – “Bloody Experiments”: Participants will see a real heart and will be able to examine it. They will take part in a competitive and role-play game where they must work together to make our heart model function. Each child will make a heart.

English Wednesday  – “The Lungs”: Children will see a real lung and examine it. They will take part in a movement game and an experiment about oxygen and carbon dioxide levels. Each child will make a lung model. *This workshop will be conducted in English and Bulgarian.

Thursday – “The Brain – Parts or Whole?”: Children will take part in games to learn about the connection between senses and the brain through direct experience, and what happens if certain parts of the brain are missing. At the end they will make a brain from natural materials.

Friday – “The Body Defends Itself”: Children will take part in an expedition to discover the causes of diseases (viruses and bacteria). They will act as immune system cells in a movement game to catch diseases and protect the body. Each child will make an immune system cell.

 

Small group, 4–6 years: Health and Survival:

Monday – “Teeth”: With the help of a story and an expedition, children will discover how cavities form and how we can protect ourselves from them. What do bacteria have to do with it? Come and find out! Each child will make toothpaste.

Tuesday – “Experiments: colors, vacuum and rocket”: Children will move colors without touching them, create colorful fireworks and an amazing vacuum with simple materials. At the end each child will make a paper rocket as a souvenir.

English Wednesday – “Honey and the Bee Family”: Children will learn what different members of the bee family do and how they communicate through role-play. Each child will make a bee. *The leader will present selected English words through a game-based approach.

Thursday – “Surviving an Avalanche”: Children will attend an interactive lecture about avalanches and then simulate one using a mountain model and artificial snow. Each child will make a clay mountain.

Friday – “Bread and Yeast”: Children will learn about yeast and microorganisms used in food production. They will take part in a fun yeast experiment. Each child will learn how bread is made and will bake bread at home.

 

27.07–31.07

Large and small group: Kitchen Science:

Monday – “Homemade pH indicator and lemonade pH. What is it?” Children will learn the science behind pH in a fun way. They will make a pH indicator from household materials and test different substances. At the end they will make lemonade and test its pH.

Tuesday – “Bioluminescence in the kitchen and invisible ink”: Children will learn about different codes and their applications. They will decode secret messages and have fun. Each child will make invisible ink to take home.

English Wednesday – “Density: Column of mixtures”: Children will learn the science behind density in a fun way. Each will make a smoothie column of liquids with different densities. *This workshop will be conducted in English and Bulgarian for the 7+ group. For the 4–6 group, selected English words will be introduced through play.

Thursday – “Beautiful crystals and minerals”: Children will go on an expedition to discover rare minerals and learn interesting facts about them. Each child will make a clay panel with semi-precious stones.

Friday – “Invisible and edible soil”: Children will learn why soil is important and its layers. They will simulate soil erosion. Each child will make a model of soil layers from food that can be eaten.

 

03.08–07.08

Large and small group: Experiments:

Monday – “Bacteria colony”: Children will discover bacteria under a microscope and take part in an interactive lecture. Each child will make yogurt as a souvenir.

Tuesday – “Science behind soap bubbles”: Children will learn how to make strong soap bubbles and the science behind them. They will create bubble solutions and test them.

English Wednesday  – “Volcanoes”: Children will discover active volcanoes through a scavenger hunt. Each child will take home a lava model. *This workshop will be conducted in English and Bulgarian for the 7+ group.

Thursday – “Make oobleck”: Children will do two experiments and learn what oobleck is. Each will make oobleck as a souvenir.

Friday – “Series of experiments”: Children will make objects disappear, test vitamin C, and learn about dissection. It will be fun and educational.

 

10.08–14.08.2026

Large and small group: Engineering and Physics:

Monday – “How do airplanes fly?” Children will learn about flight principles and explore birds and insects. Each child will make a bird-airplane model.

Tuesday – “Soap-powered boat”: Children will learn through role-play about materials and surface tension. Each will make a floating boat.

English Wednesday – “Make a catapult”: Children will learn about energy and make a catapult. *This workshop will be conducted in English and Bulgarian for the 7+ group.

Thursday – “Amazing motion – balloon cars”: Children will explore Newton’s laws and make balloon cars.

Friday – “Magic bubbles and slime”: Children will do experiments with bubbles and slime and take them home as souvenirs.

GENERAL TERMS AND CONDITIONS

1. Registration for the program is done in advance by sending an email to: reservations@machirski-sport.com. If you have any questions, you can contact us by phone: 0886 05 00 66, 0886 00 60 67.
   

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2. After confirmation from our side, you will receive a contract which must be completed and signed by you and returned.
   

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3. Payment is made in full to the bank account of “Machirski Sport” Ltd.:
   • DSK Bank AD
     IBAN: BG09STSA93000001434073
     BIC: STSABGSF
   • In the payment reference, please indicate the child’s/children’s full names and “Summer Adventure School”.

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   You can review the Privacy Policy and Personal Data Protection Declaration of “Machirski Sport” Ltd. at: https://www.machirski-sport.com/about-us/

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   It is mandatory to read our Safety Instructions.

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   The deadline by which the CUSTOMER may cancel the service without penalty is up to 10 days before the start date.

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   In case of cancellation between 9 and 3 days before the start date of the program, 50% of the amount will be refunded.

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   In case of cancellation less than 3 days before the start date, as well as after the start date, regardless of the reason, no refunds are made.

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   A missed day is not compensated and no refunds are made.

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    The customer may use the coverage of the “Trip Cancellation” insurance of ZAD ARMEEC in case of cancellation for medical reasons, for reimbursement of amounts that the tour operator does not refund under the General Terms and Conditions. The insurance can be used only if, up to 5 days after payment of the service and at least 10 days before the start date of the trip, the parent has provided the child’s full name and personal ID number (EGN), as well as written confirmation that they are familiar with the insurer’s General Terms and Conditions sent to reservations@machirski-sport.com. If these deadlines and conditions are not met, the Customer cannot benefit from the insurance coverage. *HERE you can review the General Terms and Conditions of the insurance.

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    The CUSTOMER may designate another person to use their rights under the service no later than 48 hours before the start date of the service, provided that the replacement person meets the specific requirements for performing the service. Otherwise, the TOUR OPERATOR reserves the right to adjust the service price individually depending on the feasibility of the change. For payment of the contract price and expenses related to the replacement, both the CUSTOMER and the replacing person are jointly and severally liable to the TOUR OPERATOR.

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    If the CUSTOMER has registered for a specific day of the program, they may cancel the reservation free of charge up to 10 days before the start date of the respective day. In case of cancellation between 9 and 3 days before the start date of the program, 50% of the amount will be refunded. In case of cancellation less than 3 days before the start date, as well as on the specific day, no refunds are made.

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    A child whose behavior endangers the mental and physical health of other children and/or systematically violates order and discipline, and/or damages the reputation of the TOUR OPERATOR as a whole and/or its employees and partners or another child, will be removed from the activities, and the contract will be terminated unilaterally by the TOUR OPERATOR without refund of paid fees. This measure is applied when previously applied educational measures, approaches, including joint efforts between the TOUR OPERATOR staff and parents/guardians, have not yielded results.

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    The deadline for notifying the CUSTOMER that the minimum number of participants has not been reached and therefore the program is canceled is 3 (three) days before the start date of the program.

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    Catering is paid in advance for the selected day(s) and can be canceled at least 3 working days before the requested day. In case of cancellation of catering within a shorter period, no refunds are made.

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    In case of an increase in fuel prices, Machirski Sport reserves the right to change the program price.