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Learners work in groups to construct bridges using stale marshmallows and toothpicks.

In this activity, learners create a tiny electric, motorized dancer. Learners use the interactions of magnetism and electric current to make a wire spin, while displaying the Lorentz Force in action.

In this engineering activity, learners design parachutes to give toy figures safe landings. This activity is great for practicing an important STEM skill--changing only one variable at a time.

In this activity, learners explore sound by constructing an instrument using some metal pipes, rubber bands, and a baseboard.

Learners design, build, and test models of "dragon boats" made from up to three milk cartons.

In this design challenge activity, learners build a boat that can hold 25 pennies (or 15 one inch metal washers) for at least ten seconds before sinking.

In this design challenge activity, learners build a tower that can support a tennis ball at least 18 inches off the ground while withstanding the wind from a fan.

In this activity, learners experiment with gear motion to understand how gears work to change the amount of force, speed, or direction of motion in machines.

In this activity, learners will engineer three different parachutes to test how well each one works.

In this activity, challenge learners to keep an ice cube from completely melting in 30 minutes. Learners engineer a box or wrap to prevent an ice cube from melting.

Everybody loves messy science, and Flubber is a favorite of both COSI employees and guests!

Everybody loves bubbles, and this is the best bubble recipe ever!

This game uses a modified Uno deck to review concepts related to stem cell research and diabetes.

In this design challenge activity, learners build a shock-absorbing system that will protect two “astronauts” when they land.

In this hands-on activity, learners build their own kaleidoscopes and explore how light can reflect of off surfaces such as mirrors, to produce beautiful patterns.

Learners explore the Bernoulli effect by building an airfoil (airplane wing) and making it fly.

In this activity, learners build a seesaw powered by magnets.

This activity provides a hands-on experience with a scale model, a relatively high viscosity fluid, and feeding behaviors.

In this activity, learners make a Benham Top to explore visual illusions and optics.

In this meteorology activity, learners construct simple devices to measure the direction and speed of wind.