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This is a quick activity (on page 2 of the PDF under Gecko Feet Activity) about the forces of gravity and surface tension and how their behavior is influenced by size.

In this design challenge activity, learners add a jet-propulsion system (i.e. a balloon) to a blimp so it flies straight and far under its own power.

In this challenge, learners make a helium balloon hover in one spot and then move it through an obstacle course using air currents.

Get all wrapped up in a lesson about skin!