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In this activity, learners hook up a hair to a lever system and create a hair hygrometer to measure changes in humidity.

Learners use a simple process to extract DNA from strawberries.

In this activity, learners mix milk, vinegar, baking soda, and water to create sticky glue. Use this activity to explain how engineers develop and evaluate new materials and products.

In this activity, learners model directed evolution by making paper fly. Learners construct and fly paper airplanes.

In this activity (on page 2 of the PDF), learners make a plastic protein polymer from milk. Adding vinegar to milk causes the protein casein to solidify or curdle.