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In this activity, challenge learners to keep an ice cube from completely melting in 30 minutes. Learners engineer a box or wrap to prevent an ice cube from melting.

$1 - $5 per student Ages 6 - 11 30 to 45 minutes
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In this engineering activity, challenge learners to make a "grabber" that can pick up trash. Learners use simple materials to create pinchers that can grab small items.

$1 - $5 per student Ages 6 - 11 10 to 30 minutes
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In this activity (4th activity on the page), learners test to see if saliva is necessary for food to have taste.

$1 - $5 per group Ages 8 - 18 5 to 10 minutes
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In this genetics activity, learners create and decode a “DNA recipe” for a dog by randomly selecting strips of paper that represent DNA.

$1 - $5 per group Ages 8 - 18 45 to 60 minutes
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In this quick activity, learners break the tension that happens when water develops a "skin." Learners use water, pepper and some soap to discover the wonders of surface tension—the force that attract

$1 - $5 per student Ages 6 - 11 5 to 10 minutes
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In this activity (on pages 11-12 of PDF) learners create models of lava layers that have formed on the moon.

$1 - $5 per group Ages 8 - 14 30 to 45 minutes
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Learners model the ocean currents that carry hot water from the tropics to northern latitudes.

$1 - $5 per group Ages 8 - 11 10 to 30 minutes
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In this activity, learners will write a secret message that only their friends will be able to read.

$1 - $5 per student Ages 8 - adult 10 to 30 minutes
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Break open that used musical toy and squish some Play-Doh over the circuit boards, and you will hear some weird and distorted sounds the manufacturer never intended!

$1 - $5 per student Ages 4 - adult 45 to 60 minutes
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In this hands-on activity, learners build their own kaleidoscopes and explore how light can reflect of off surfaces such as mirrors, to produce beautiful patterns.

$1 - $5 per group Ages 6 - 11 30 to 45 minutes
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This demonstration/activity helps learners understand why higher elevations are not always warm simply because "hot air rises." Learners use a tire pump to increase the pressure and temperature inside

$1 - $5 per group Ages 8 - 18 10 to 30 minutes
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Many common household cleaners are antimicrobials.

$1 - $5 per group Ages 8 - adult 10 to 30 minutes
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In this activity, learners explore the design of tall structures such as skyscrapers and telecommunication towers.

$1 - $5 per group Ages 8 - 18 1 to 2 hours
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In this activity learners explore surface tension. Why are certain objects able to float on the surface of water and how do detergents break the surface tension of water?

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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In this design challenge activity, learners build a four-stringed instrument that can play a tune.

$1 - $5 per student Ages 8 - 14 45 to 60 minutes
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In this activity, learners compare plant and animal life in different habitats including a sidewalk crack and lawn. Learners sort human-made materials and natural materials found in each habitat.

$1 - $5 per student Ages 6 - 11 10 to 30 minutes
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In this activity about human anatomy (page 16 of PDF), learners construct a model arm and discover how muscles and bones work together to achieve efficient movement.

$1 - $5 per group Ages 6 - 11 45 to 60 minutes
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In this activity, learners construct a traditional handicraft toy that illustrates a motion commonly associated with violins and earthquakes.

$1 - $5 per student Ages 6 - 11 45 to 60 minutes
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In this activity, learners build a mini crank machine to make a bird "fly." This engineering activity introduces learners to automata, rotational motion, cranks and cams.

$1 - $5 per student Ages 6 - 11 1 to 2 hours
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In this activity about the solar system, learners use various light sources to examine ice with different components to understand how NASA studies planets and moons from space.

$1 - $5 per group Ages 4 - 11 1 to 2 hours