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In this activity about ramps, learners explore and measure the rate at which spherical objects roll down a ramp.

In this quick activity, learners use a toaster to investigate the source for the Earth's wind. Learners hold a pinwheel above a toaster to discover that rising heat causes wind.

Create your own spinning top, and explore color, shapes and spinning. This activity contains instructions for making your spinning top, and tips on how to design and decorate it.

This is a highly visual demonstration that illustrates both the effects of density and chemical reactions.

This activity about density provides instructions for making a miniature "lava lite" with just salt, oil, water, and food coloring.

In this indoor or outdoor demonstration, use a large and small ball to illustrate conservation of energy and momentum.

Experiment with force and pressure by building a balloon rocket. When launched, the balloon will run a track wherever you place the string.