Discover the exciting world of drones and their amazing missions!

Through scientific investigations, students will explore how animals adapt to survive and thrive in their environments.

Join our STEM Explorers class where we will learn about simple machines and get creative with recyclable materials as we design and build our very own projects.

Join us in the Maryville Crime Lab where we will solve puzzles about crimes just like a scientist!

Get ready for an action-packed adventure in our Gravity Grand Prix course!

Fuel your child's curiosity and drive to create with this dynamic session focusing on AI and Machine Learning!

Students will participate in the following two activities. Lunch is included with the cost of registration along with exposure to Maryville's campus and college experiences.

Students will participate in the following two activities. Lunch is included with the cost of registration along with exposure to Maryville's campus and college experiences.

Roll up your sleeves, put on your makers cap, and get ready to create! This is our most hands-on camp! Together, campers will build a geodesic dome large enough to sit in. Who can build the strongest bridge? Can your bridge withstand the shake rattle and roll challenge? Explore the world of birds and beasts with bird feeder building and our super bug investigation. Speaking of birds, what did Hooty the owl have for dinner? A mouse? A Squirrel? A Frog? Kids will dissect owl pellets and reconstruct Hooty’s dinner. Enter the Mad Science chemistry lab and mix, mash, and brew concoctions to create cool sidewalk chalk and bath fizzers! Assemble and control pulleys, levers, catapults, simple machines, and megapinchers! Campers will discover the wonders of photography and make their own chromatography-dyed T-shirt. It’s a week packed with non-stop science fun! Complimentary after-care is included from 3:00 pm to 4:00 pm. Additional before and after-care is available through Ballwin Parks and Recreation.

Camp Ondessonk's traditional summer camp for children ages 10-15 years old. Traditional summer camp provides exceptional outdoor progamming, including horseback riding, archery, caneoing, and more.

Camp Ondessonk's traditional summer camp for children ages 10-15 years old. Traditional summer camp provides exceptional outdoor progamming, including horseback riding, archery, caneoing, and more.

Camp Ondessonk's Mini Camp for children ages 8-10 years old. Mini Campers receive nearly constant guidance from our staff while boating, swimming, riding ponies, and more.

Camp Ondessonk's Mini Camp for children ages 8-10 years old. Mini Campers receive nearly constant guidance from our staff while boating, swimming, riding ponies, and more.

Mini-Camp Explorers offers adventurous 8 – 10-year-old children an extended experience building upon our popular Mini Camp program. Mini Camp Explorers provides boating, swimming, riding ponies, and more.

Love horses? Love Camp O? Want both? Horse Camp is for you.