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In this activity, learners construct their own small catapults using simple materials. Learners follow visual instructions to build their launching device.

This trick from Exploratorium physicist Paul Doherty lets you add together the bounces of two balls and send one ball flying.

In this activity, learners build a simple mechanism that regulates the "escape" of energy released by a falling weight by portioning it into discrete amounts.

In this activity, learners burn a peanut, which produces a flame that can be used to boil away water and count the calories contained in the peanut.