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By making models of light waves with paper, learners can understand why different colors appear in bubbles.

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

Learners build a model of a pollution control device--a cyclone. A cyclone works by whirling the polluted air in a circle and accumulating particles on the edges of the container.

Teams of learners use a series of stick figures made from pipe cleaners to model a dance routine. Then, they use this model to communicate to another learner who performs the dance routine.

Learners will construct a model of a heart valve using a film canister, a piece of masking tape, and a piece of paper.