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In this engineering activity, learners explore simple machines and then build cardboard automata using cams.

This activity guide features three related explorations to help learners ages 3-6 investigate shadows via the following science concepts: A shadow is made when an object blocks the light; you can chan

In this design challenge activity, learners add headphones to a previously built instrument (see "Build a Band" activity) to make it easier to hear.

In this hands-on activity, learners determine the types of chemical reactions achieved when combining different household products.