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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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Using a milk-based recipe, learners create "moo glue" which is basically white school-type glue. The "secret ingredient" in milk that helps make glue is a chemical called casein.

$1 - $5 per group Ages 6 - 14 30 to 45 minutes
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You may have tried to throw a curveball or a slider, or even a screwball, with an ordinary baseball and found it difficult to do.

1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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In this three-part activity, learners use paper to explore Bernoulli's Principle — fast-moving air has lower pressure than non-moving air.

1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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In this activity, learners explore the gait of horses by constructing flipbooks with British photographer Eadweard Muybridge's famous photographs.

$1 - $5 per student Ages 6 - 14 10 to 30 minutes
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In this a hands-on activity, learners explore how to put ice cream in an oven without it melting. Ideas in this activity include insulation and cooking.

$1 - $5 per student Ages 4 - 14 5 to 10 minutes
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In this weather forecasting activity, learners use common materials to construct a rain gauge and measure daily, monthly, and yearly rainfall.

1 cent - $1 per student Ages 6 - 14 30 to 45 minutes
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In this activity, learners explore materials through paper chromatography.

$5 - $10 per group Ages 6 - adult 5 to 10 minutes
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In this activity, learners use their strength to light a light bulb. A chain made from paper clips is placed in series with a battery and flashlight bulb.

$5 - $10 per group Ages 11 - 18 10 to 30 minutes
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In this activity, learners discover the importance of maps and scale as they work together to create a map of the classroom.

free Ages 11 - 18 45 to 60 minutes
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How can you make one shade of gray look like two? By putting it against two different color backgrounds! This activity allows learners to perform this sleight of hand very easily.

$1 - $5 per student Ages 8 - 18 30 to 45 minutes
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This activity helps learners understand how the angle of the Sun affects temperatures around the globe.

$1 - $5 per group Ages 11 - 18 45 to 60 minutes
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Learners carefully look at four known household crystals.

$1 - $5 per group Ages 8 - 14 30 to 45 minutes
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In this activities, learners head outside and investigate trees through bark rubbings. Learners will need paper, a pencil, and some unwrapped crayons to create them.

1 cent - $1 per student Ages 4 - 14 5 to 10 minutes
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In this mathematics activity (page 4 of the PDF), learners will explore the relationship between the diameter and circumference of an object.

$1 - $5 per student Ages 11 - 18 10 to 30 minutes
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In this physics demonstration, learners are challenged to insert a straw the furthest into a potato.

$1 - $5 per group Ages 4 - adult 5 to 10 minutes
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In this math game (Page 17 of the Are You Game? PDF), learners investigate probability by tossing coins.

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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In this chemistry activity, learners explore density by using four solids and 6 liquids to create colorful, layered rows.

$1 - $5 per group Ages 6 - 18 5 to 10 minutes
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This is an activity (located on page 3 of PDF under Where's Nano? Activity) about identifying nanoscale objects and phenomena in today's world.

free Ages 8 - 14 1 to 7 days
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Learners examine collisions between two skateboards carrying different masses. They learn about conservation of momentum in collisions.

free Ages 11 - 18 30 to 45 minutes