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In this activity, learners build an old-fashioned paddle boat out of simple materials.

In this activity, learners identify different plastics in a mystery bag. Learners discover that plastics are classified #1 through #7.

In this activity about the circulatory system and space travel (on page 38 of the PDF), learners use water balloons to simulate the effects of gravity and microgravity on fluid distribution in the bod

In this design challenge activity, learners make a balloon hover at eye level for five seconds, and then make it move by creating air currents.