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In this weather activity/demonstration, learners watch as a ping pong ball is suspended in a stream of air supplied by a hair dryer.

free Ages 6 - 14 5 to 10 minutes
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In the related activity called "Colors Collide or Combine," learners are intrigued by the apparent "line" that forms where colors from M&M coatings meet but do not mix.

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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In this four-part activity, learners explore how the body works and the chemistry that happens inside living things.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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Each group of learners uses everyday materials, such as paper, toothpicks, and tape to design and construct a structure intended to support the weight of a cinder block for 30 seconds.

$1 - $5 per group Ages 11 - 14 1 to 2 hours
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In this activity, learners investigate visual perception as well as plan and conduct their own experiments.

1 cent - $1 per group Ages 8 - 18 1 to 2 hours
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In this activity, learners observe how salinity affects the freezing point of water by making and enjoying ice cream.

$5 - $10 per group Ages 6 - 14 30 to 45 minutes
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In this astrobiology activity (on page 11 of the PDF), learners consider what organisms need in order to live (water, nutrients, and energy).

Over $20 per group Ages 8 - 18 1 to 4 weeks
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This is an activity (located on page 3 of the PDF) about the mixture of materials in bone and how they affect its strength.

$10 - $20 per group Ages 8 - 14 2 to 4 hours
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In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.

$1 - $5 per student Ages 6 - 18 30 to 45 minutes
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In this activity (page 7 of PDF), learners will identify the general two-dimensional geometric shape of the uppermost cross section of an impact crater.

$10 - $20 per student Ages 8 - 14 45 to 60 minutes
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In this physics activity, learners build a toy with a figure that spins around like a gymnast on the high bar.

$5 - $10 per student Ages 8 - 18 1 to 2 hours
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In this activity, learners investigate procedural memory.

$1 - $5 per student Ages 8 - 18 45 to 60 minutes
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In this activity, learners compare and contrast different forms of luminescence by observing how chemiluminescence, phosphorescence, and fluorescence produce or emit light.

$10 - $20 per group Ages 11 - 14 30 to 45 minutes
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In this activity, learners use gumdrops and toothpicks to model the composition and molecular structure of three greenhouse gases: carbon dioxide (CO2), water vapor (H2O) and methane (CH4).

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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In this quick activity about predicting (located on page 2 of the PDF under Where's Nano?

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners become detectives and use chemistry to investigate fingerprints.

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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In this physical sciences activity, learners explore how passive solar design increases energy efficiency.

$1 - $5 per group Ages 8 - 14 1 to 2 hours
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In this small-group activity, learners assume the roles of pilots, air traffic controllers, and NASA scientists to solve five Air Traffic Control (ATC) problems.

$5 - $10 per group Ages 8 - 18 1 to 7 days
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In this activity, learners build penetrometers to test leaf toughness. Biologists measure leaf toughness to study the feeding preferences of insects and bugs.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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This activity generates learner excitement about light through the creation of a room-sized rainbow.

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