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In this activity, learners explore the "nuts and bolts" of gene chips.

Have you ever heard of a camera without a lens? In this activity, learners create a pinhole camera out of simple materials. They'll see the world in a whole new way: upside down and backwards!

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 web-based activity, learners try to figure out who in an online chat room has their matching puzzle piece.