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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.

free Ages 11 - adult 10 to 30 minutes
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In this activity, learners explore a surprising method for calculating the mathematical constant pi, known as Buffon's Needle.

$1 - $5 per student Ages 11 - 18 5 to 10 minutes
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In this activity, learners will construct an air cannon as a model for the human ear.

$1 - $5 per student Ages 11 - adult 10 to 30 minutes
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In this demonstration/activity, learners observe as a regular size marshmallow is blown through a tube made from a manila file folder.

$1 - $5 per group Ages 8 - 18 10 to 30 minutes
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In this trick, learners discover how to stick a straw to the palm of their hand, window door, or anywhere using static electricity.

1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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In this engineering design challenge, learners build an air-powered spinning machine.

$1 - $5 per group Ages 4 - 18 1 to 2 hours
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Learners observe a flask with a balloon attached over the mouth and inverted inside the flask.

$1 - $5 per group Ages 11 - adult 30 to 45 minutes
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This simple, yet surprising physics demonstration challenges preconceptions about forces, and demonstrates the strength of atmospheric pressure.

free Ages 4 - adult Under 5 minutes
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In this engineering design challenge, learners build an octopus-inspired suction pad that can grab an object and hold it tightly in the air.

$5 - $10 per student Ages 4 - 18 1 to 2 hours
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In this activity, learners explore how sound travels through solid objects better than through air. Leaners attach a metal clothes hanger to a piece of string and hold it to their ears.

$1 - $5 per student Ages 6 - 18 5 to 10 minutes
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In this activity, learners explore Boyle's Law and discover that water will boil at room temperature if its pressure is lowered.

1 cent - $1 per student Ages 11 - 18 10 to 30 minutes
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In this activity, learners design and build their own parachute using household materials with the goal of landing their passenger safely on a target.

$5 - $10 per group Ages 4 - adult 10 to 30 minutes
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Learners make a skydiver and parachute contraption and launch it. They see that the drag created by air resistance slows the descent of skydivers as they travel back to Earth.

1 cent - $1 per group Ages 11 - 18 30 to 45 minutes
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In this activity, learners trap a thin layer of air between two pieces of Plexiglas to produce rainbow-colored interference patterns.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes
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In this activity, learners turn an ordinary metal coat-hanger into a (very quiet) musical instrument.

1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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In this demonstration, learners observe the effects of density and pressure. A "diver" constructed out of a piece of straw and Blu-Tack will bob inside a bottle filled with water.

1 cent - $1 per group Ages 4 - adult Under 5 minutes
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In this activity, learners use a flashlight, a glass of water, and some milk to examine why the sky is blue and sunsets are red.

1 cent - $1 per group Ages 11 - 18 5 to 10 minutes
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In this physics activity, learners will explore buoyancy.

1 cent - $1 per student Ages 4 - adult 10 to 30 minutes
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In this weather activity (page 10 of the PDF), learners will demonstrate the changes in atmospheric pressure by constructing their own barometer.

$1 - $5 per student Ages 11 - 18 1 to 7 days
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In this design and physics challenge, learners construct a cylindrical wing, fly it, make modifications, and determine how the changes affect flight patterns.

1 cent - $1 per student Ages 8 - 18 45 to 60 minutes