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Build a catapult that transforms the potential energy of a twisted rubber band into kinetic energy. Experiment with design variations so that you can hit a target with a projectile.

In this activity, learners build a racecar using only a rubber band, spool, straw, and paper clip! This racer is a classic toy that zips across a flat surface.

In this design challenge activity, learners build a rubber band-powered rover that can scramble across the room.

Learners attach an egg to a rubber-band bungee cord and drop the egg.

In this activity, learners explore the properties of paper by constructing and modifying paper airplanes.

This is an activity about friction as well as kinetic and potential energy.

When baseball was in its infancy, the ball had plenty of bounce. Today's baseball may not seem to have bounce to it at all; if you drop a ball on the field it won't bounce back.

In this dynamic activity, learners build a catapult that launches projectiles, such as marshmallows.