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In this activity, learners model the gravitational fields of planets on a flexible surface.

In this activity, learners build edible models of Jupiter and Earth to compare their sizes and illustrate the planets' internal layers.

In this activity, learners build rockets and shoot them into the air by stomping on the plastic bottle launchers.

In this design challenge, learners will create their own roller coaster using household objects for the track and a marble or small ball as their cart.

In this activity, learners make bridges using an oil-based modeling clay (plasticene). The instructions include discussion questions for both before and after bridge building.

In this design challenge activity, learners build a tower that can support a tennis ball at least 18 inches off the ground while withstanding the wind from a fan.

In this activity, learners will engineer three different parachutes to test how well each one works.

In this project, students explore how levers work, by making a puppet with moving limbs.

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