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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 construct speedy vehicles made out of paper plates and powered by twisted rubber bands.

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

In this activity, learners explore the concept of how brakes can stop or slow mechanical motion.

In this activity, learners use a compass, powerful magnet, and copper magnet wire to build a special generator known as a dynamo.

In this activity, learners will build a roller coaster for a marble to run on using everyday household materials such as paper towel or toilet paper rolls, cups, boxes, books, buckets, chairs, etc.

In this design challenge, learners will create their own roller coaster using household objects for the track and a marble or small ball as their cart.

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