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In this investigation, learners explore the force known as buoyancy by placing various objects into water and observing how they behave (for example, which sink more quickly, which float, how much wat

In this activity, learners build a sled kite that models a type of airfoil called a parawing.

In this design challenge activity, learners build a shock-absorbing system that will protect two “astronauts” when they land.

In this activity, learners work in pairs to measure each other's ankles with lengths of string.

In this chemistry demonstration, acid rain is simulated in a petri dish.

This three-part activity shows learners how to build three meteorology tools: a wind vane, a rain gauge, and a barometer.