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In this activity, learners imitate the way vocal cords work by building a model from a plastic cup, rubber band, and a straw.

In this optics activity, learners use water to make a coin "appear" and "disappear." Use this activity to demonstrate how light refracts and introduce light as waves.

In this activity, learners construct a playable kazoo from inexpensive materials. They will experience how vibration creates sound waves and music.