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In this design challenge, learners will use microbes to design and grow a custom biomaterial at home and make something creative with it.

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

In this activity (on pages 18-28), learners explore how the shape of seeds affects how they are dispersed by wind, birds, ocean currents and other means.

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

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.