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In this simulation of natural selection, learners use binder clips in three different sizes to represent the diversity of beak sizes in a bird population.

$5 - $10 per group Ages 11 - 18 45 to 60 minutes
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In this activity, learners make or use pre-made clay beams to scale and proportion. Specifically, they discover that when you scale up proportionally (i.e.

$10 - $20 per group Ages 4 - 14 45 to 60 minutes
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In this activity (12th activity on the page), learners conduct an experiment to demonstrate how muscles are constantly feeding information to the brain about what they are doing.

free Ages 8 - 18 5 to 10 minutes
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In this interactive activity, learners analyze seashells to explore phylogeny and evolution. Learners identify similar and dissimilar seashells to create a phylogenetic tree.

free Ages 11 - 18 10 to 30 minutes
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In this activity, learners explore trebuchet design. Teams of learners construct trebuchets from everyday materials.

$10 - $20 per group Ages 11 - 18 1 to 2 hours
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In this nutrition activity (page 26 of PDF), learners consider the nutritional needs of people with specific dietary requirements, such as athletes, persons with diabetes and vegetarians, and create a

free Ages 8 - 14 1 to 2 hours
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In this two-part activity, learners map a navigation plan to get from Earth to Mars and back. In activity one, learners represent the orbital paths of Earth through dance and dramatic movement.

1 cent - $1 per group Ages 8 - 18 45 to 60 minutes
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In this activity, learners build a seesaw powered by magnets.

$1 - $5 per student Ages 6 - 14 30 to 45 minutes
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In this activity, learners will perform various investigations to understand the vestibular-ocular reflex and learn about the importance of visual cues in maintaining balance.

$1 - $5 per group Ages 8 - 18 45 to 60 minutes
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In this activity, learners use oil, water, food coloring and antacid tablets to create a bubbling lava lamp. Use this activity to introduce concepts related to density, hydrophobicity vs.

$5 - $10 per student Ages 6 - 11 10 to 30 minutes
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During this activity, learners will make different versions of "ooze" using varied proportions of detergent and glue.

$5 - $10 per group Ages 6 - 14 10 to 30 minutes
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In this activity, learners explore rocketry and the principals of space flight.

Over $20 per group Ages 8 - 18 1 to 2 hours
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In this exercise and nutrition activity, learners will explore how food is the fuel that powers them. They will create a chart to figure out how many calories they burn during recess.

$5 - $10 per student Ages 11 - 14 1 to 7 days
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In this activity, learners actually feel the difference in energy required to light two different types of light bulbs: incandescent light and LEDs.

$5 - $10 per group Ages 8 - 14 5 to 10 minutes
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In this activity, learners explore how engineers have developed sorting systems which integrate into manufacturing and packaging processes. Learners explore how coins are made.

$5 - $10 per group Ages 8 - 18 1 to 2 hours
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This is a series of quick activities/demos and pre-assessment tools that evaluate learners' current understanding of microbes and introduce them to basic information about microbes.

Over $20 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners build mini catapults using paint paddles and a spoon. Use this activity to introduce learners to forces and projectile motion.

$1 - $5 per student Ages 6 - 18 10 to 30 minutes
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This lesson guide includes six simple and quick activities to help learners better understand Bernoulli's Principle.

$1 - $5 per student Ages 8 - 11 30 to 45 minutes
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In this activity, learners explore moving air and the physics of lift and drag by constructing homemade wind tunnels.

$10 - $20 per group Ages 6 - 11 1 to 2 hours
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In this activity, learners work in groups to design a parachute out of household items that keeps an egg secure when dropped from a certain height.

free Ages 11 - 18 45 to 60 minutes