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In this math activity, learners trace their hands and estimate the number of beans that can fit into their hand tracings. Then, learners glue the beans to the tracing to test out their estimations.

$1 - $5 per student Ages 4 - 8 5 to 10 minutes
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In this activity about olfaction (8th activity on the page), learners smell 10 different items with different odors. Then they try to identify the smells when they are mixed together.

$1 - $5 per group Ages 8 - 18 5 to 10 minutes
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In this chemistry activity (page 3 of the PDF), learners will learn about crystals by growing their very own.

$1 - $5 per student Ages 6 - 14 1 to 7 days
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In this activity (1st activity on the page), learners explore their sense of taste and the structure of the tongue by taste-testing various foods.

$1 - $5 per group Ages 8 - 18 10 to 30 minutes
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Learners build particulate matter collectors--devices that collect samples of visible particulates present in polluted air.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners make bridges using an oil-based modeling clay (plasticene). The instructions include discussion questions for both before and after bridge building.

$1 - $5 per group Ages 4 - 11 30 to 45 minutes
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In this demonstration about force and motion, learners will explore the forces that affect a pendulum A simple model pendulum comprised of a ball and string demonstrates how pendulums work as well as

$1 - $5 per student Ages 4 - 11 5 to 10 minutes
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Learners make a refrigerator that works without electricity. The pot-in-pot refrigerator works by evaporation: a layer of sand is placed between two terra cotta pots and thoroughly soaked with water.

$1 - $5 per group Ages 11 - 14 45 to 60 minutes
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Learners make their own acid-base indicator from red cabbage. They use this indicator to test substances around the house.

$1 - $5 per student Ages 6 - 14 10 to 30 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 will explore engineering to construct an insect collecting tool (insect aspirator). The pooter uses suction to safely collect smaller insects that nets miss or may injure.

$1 - $5 per student Ages 4 - 14 5 to 10 minutes
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In this activity, learners will model the mechanical weathering and erosion of rocks in a stream or river.

$1 - $5 per group Ages 8 - 11 10 to 30 minutes
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In this activity, learners explore sound by constructing their very own banjo out of a coffee can. Learners experiment with the canjo to change the instrument's pitch and timbre.

$1 - $5 per student Ages 6 - 18 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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Learners combine hydrogen peroxide with three different forms of potato: raw chunks, ground chunks, and boiled chunks.

$1 - $5 per group Ages 11 - adult 5 to 10 minutes
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In this activity about the relationship between food and energy (page 5 of PDF), learners conduct an experiment to compare how much energy is released as heat from two different foods.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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Learners design their own experiment to investigate how pollution diffuses through ground material.

$1 - $5 per group Ages 11 - 14 30 to 45 minutes
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Learners test solutions of water, sugar, salt, and hydrochloric acid for electrical conductivity. They immerse leads from a lighting device (a battery pack connected to an LED) into each solution.

$1 - $5 per group Ages 14 - adult Under 5 minutes