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Learners use a transparent plastic glove as a container to grow seeds. A different kind of seed can be planted in each finger.

$1 - $5 per student Ages 6 - 14 1 to 4 weeks
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This activity provides an opportunity for learners to observe and examine how carbon dioxide, water, and light produce glucose/starch through a process called photosynthesis.

$5 - $10 per group Ages 14 - 18 1 to 7 days
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In this activity, learners use plastic water bottles, wood, and water to build an inexpensive and portable tool to demonstrate one atmosphere of pressure at sea level.

$1 - $5 per student Ages 11 - 18 45 to 60 minutes
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Learners place cut flowers in colored water and observe how the flowers change. The flowers absorb the water through the stem and leaves.

$1 - $5 per student Ages 8 - 18 1 to 7 days
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In this activity (on pages 25-31 of PDF), learners soak sponges with different amounts of plaster of paris to simulate different levels of calcification in bone formation.

$1 - $5 per student Ages 8 - 14 1 to 7 days
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This is an activity (on page 2 of the PDF under Bone Regrowth Activity) about the two main components of bone - collagen and minerals (like calcium) - and how they each contribute to its flexibility a

$5 - $10 per group Ages 8 - 14 1 to 7 days
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This guided inquiry three-part activity engages learners in thinking about the mechanism of natural selection by encouraging them to formulate questions that can be answered through scientific investi

$10 - $20 per group Ages 11 - 18 2 to 4 hours
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These two activities (4th on the page) demonstrate the importance of two eyes in judging depth.

1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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In this activity, learners build models of comets, using edible materials, to learn about comets' structure.

Over $20 per group Ages 6 - 18 45 to 60 minutes
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This guided inquiry three-part activity engages learners in thinking about the mechanism of natural selection through data collection and pattern recognition.

$5 - $10 per group Ages 11 - 18 1 to 2 hours
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In this health activity, learners create a device so that they not only feel their heartbeat, but also see it, using a straw and some clay.

1 cent - $1 per student Ages 6 - 11 10 to 30 minutes
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In this activity, learners grow germs collected from their hands and other objects. They cultivate the germs on a growth medium (such as slices of grapefruit or processed cheese) for a week.

1 cent - $1 per student Ages 6 - 14 1 to 7 days
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In this activity, learners discover why only some types of plastic can be recycled.

$1 - $5 per group Ages 14 - adult 45 to 60 minutes
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In this activity (on pages 19-24 of PDF), learners soak chicken bones or eggshells in vinegar for several days.

1 cent - $1 per student Ages 8 - 14 1 to 4 weeks
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In this activity, learners use chocolate to explore how the Sun transfers heat to the Earth through radiation.

1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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Build a fruit fly trap out of a 2-liter plastic bottle and some rotten fruit! Fruit flies are easy to catch in warm weather. Once you catch some, you will be able to see their life cycle up-close.

1 cent - $1 per student Ages 4 - 11 1 to 4 weeks
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En esta tira cómica, Mateo y Cientina observan unas hormigas para contestar algunas preguntas: ¿Qué comen las hormigas?

1 cent - $1 per group Ages 8 - 11 10 to 30 minutes
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Learners take a field trip along a local body of water and conduct a visual survey to discover information about local land use and water quality.

$10 - $20 per group Ages 11 - 18 1 to 2 hours
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In this activity, learners compare ways to measure their heart rates. Learners build their own stethoscopes and learn how exercise affects heart rate.

$5 - $10 per group Ages 8 - 14 1 to 2 hours
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In this activity, learners observe the hydrologic cycle in action as water evaporates and condenses to form rain right before their eyes.

1 cent - $1 per group Ages 4 - 14 10 to 30 minutes