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In this activity, challenge learners to float a paper clip in a cup of water. Learners discover that a paper clip will sink in a cup of water, except when it is placed on a piece of paper towel.

In this activity, challenge learners to predict and investigate how many water drops they can fit on one penny.

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.