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In this engineering design challenge, learners make a bubble maze that allows bubbles to move through a series of “on” and “off” switches.

$5 - $10 per group Ages 4 - 18 1 to 2 hours
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In this activity, learners experiment with creating various types of bubble solutions and testing which ingredients form longer-lasting bubbles.

$10 - $20 per student Ages 11 - 14 45 to 60 minutes
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In this activity, learners will explore density and it's relationship with mass.

$1 - $5 per group Ages 4 - 11 10 to 30 minutes
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In this demonstration, learners observe the effects of air pressure. They will watch as marshmallows inside a bottle expand as a vacuum pump removes air from the bottle.

$1 - $5 per group Ages 4 - adult Under 5 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 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 quick activity (page 1 of the PDF under SciGirls Activity: California Fish), learners will build a simple Cartesian Diver in an empty 2-liter bottle.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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In this quick activity (page 1 of PDF under SciGirls Activity: Lift Off), learners will use the ever-popular soda geyser experiment to test the reactivity of the various sugar candies or mints.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes