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In this activity on page 7 of the PDF, learners explore how engineers characterize building materials.

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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In two separate bags, learners mix water with Epsom salts and detergent.

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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In this physical sciences activity, learners explore how passive solar design increases energy efficiency.

$1 - $5 per group Ages 8 - 14 1 to 2 hours
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In this water pollution activity, learners create pond water cultures and investigate the effects of adding chemicals or natural nutrients.

$5 - $10 per group Ages 8 - 14 1 to 7 days
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In this environmental health activity, learners investigate their own vital lung capacities.

$1 - $5 per group Ages 8 - 14 1 to 2 hours
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In this activity, learners explore the relative size of the Sun and Earth as well as the distance between them.

1 cent - $1 per group Ages 6 - 18 5 to 10 minutes
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In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain.

1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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In this activity learners compare the bounciness of warm and cold racquetballs to see if temperature makes a difference in how well they bounce.

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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Combine la lógica y los números en este juego para todas las edades.

free Ages 4 - 14 5 to 10 minutes
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This activity (on pages 13-18) has learners build a model tree and then figure out how to make their tree stand up by itself.

$1 - $5 per group Ages 8 - 14 1 to 2 hours
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In this activity (on pages 26-33), learners play parasitologists, solving several "mysteries" about people who got sick from various parasites. In teams of four, each member solves one mystery.

1 cent - $1 per student Ages 8 - 14 45 to 60 minutes
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In this activity on page 7 of the PDF (Chemistry—It’s Elemental), learners use iodine to identify foods that contain starch.

$1 - $5 per student Ages 6 - 14 10 to 30 minutes
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In this activity on page 10 of the PDF, learners develop an experiment to answer the following question: "How much water can the hydrogel in a baby diaper hold?" Use this activity to explore polymers,

$1 - $5 per student Ages 8 - 18 10 to 30 minutes
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In this food science activity, learners conduct an experiment that demonstrates the importance of light to plants.

$5 - $10 per group Ages 8 - 14 1 to 4 weeks
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In this activity on page 6 of the PDF (Chemistry—It’s Elemental), learners explore some of the properties of copper using a few common household ingredients.

$1 - $5 per student Ages 6 - 14 10 to 30 minutes
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In this activity on page 7 of the PDF (Water in Our World), learners make their own water treatment systems for cleaning water.

$5 - $10 per student Ages 8 - 14 45 to 60 minutes
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In this environmental health activity, learners grow and observe bread mold and other kinds of common fungi over the course of 3-7 days.

1 cent - $1 per group Ages 8 - 14 1 to 7 days
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This is an activity in which learners will find that they can detect differences in concentration better with their nose (smelling) than with their eyes (seeing).

$5 - $10 per group Ages 4 - adult 5 to 10 minutes
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This reading and writing activity (on pages 2-9) teaches what plant parts should be avoided, how a person can get rid of toxins, symptoms of plant poisoning, and how plants create poisons to repel pre

$1 - $5 per group Ages 8 - 14 30 to 45 minutes
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This activity gives caregivers and their children an opportunity to practice scientific ways of thinking that are developmentally appropriate for early learners.

Over $20 per group Ages 4 - 8 10 to 30 minutes