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In this activity, learners simulate what happens to a human spine in space by making Sponge Spool Spines (alternating sponge pieces and spools threaded on a pipe cleaner).

In this space science activity, learners work together to create a human-powered orrery to model the movements of the four inner planets.

In this activity (on page 5 of PDF), learners use dry ice and household materials to make scientifically accurate models of comets.

In some parts of the world, lakes freeze during winter. In this activity learners will explore water’s unique properties of freezing and melting, and how these relate to density and temperature.

In this activity, learners make balloon models of disease-causing bacteria.