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In this activity, learners use a hand-made protractor to measure angles they find in playground equipment.

In this activity, learners build a tool called an inclinometer that can find the height of any distant object, from a tree to the North Star.

Build a hydrometer (measures the density of a liquid) using a pipet or eyedropper.

Yes, you can weigh your car by figuring out your wheel's tire pressure combined with the "tire's footprint." You'll need someone with a car, driver's license, and safety in mind.

In this activity, learners hook up a hair to a lever system and create a hair hygrometer to measure changes in humidity.

In this activity you'll see how the sun's tilt on its axis changes the length of shadows. For example, why is your shadow longer in winter than in summer?