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In this activity, learners explore force and motion by constructing cardboard cars that are propelled by balloons.

In this activity, learners turn empty 2-liter bottles into a see-through compost container.

In this fun and, at times, hilarious force and motion activity, learners will use household objects to build a crazy contraption and see how far they can get a tennis ball to move.

In this activity, learners build a sled kite that models a type of airfoil called a parawing.

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

In this activity, learners make optical fibers out of strips of gelatin.

In this activity, learners make and test fly paper helicopters. Learners use templates to create paper helicopters and then take take turns flying them in the air.

This activity explores the basic workings of a siphon, which is the core technology that makes toilets work.