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In this activity related to indoor air pollution, learners build take-home dust catchers with wax paper and petroleum jelly.

In this activity (on pages 10-15), learners investigate starch in human diets and how plants make starch (carbohydrates) to use as their food source.

In this activity (on pages 10-17), learners discover how scientists study biodiversity and the health of the environment based on inspection of small areas—a process known as sampling.

This activity (on pages 13-18) has learners build a model tree and then figure out how to make their tree stand up by itself.

In this fascinating and fun experiment, learners use chemistry to identify a mystery powder and to solve a "crime," a process similar to that used by real forensic scientists.

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

In this activity (page 4), learners work in groups to plan and build large structures using recyclable materials they have brought from home.