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    Lawrence Hall of Science
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    In this activity, learners explore a bucket of sand and beach objects. First they sort items using observable characteristics, then they turn hard candy into "candy sand" to model where...

    $1 - $5 per group Ages 4 - adult 10 to 30 minutes
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    New Jersey Department of Education
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    In this activity, learners create a freshwater ecosystem in a large plastic bottle. Learners cut and prepare bottles, then fill with water, aquatic plants, snails and fish. Learners observe their...

    $10 - $20 per group Ages 8 - 18 1 to 7 days
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    New Jersey Department of Education
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    In this fun and in depth hands-on experiment, learners test various liquid samples (distilled water, lemon juice, vinegar, and baking soda mixed with water) to determine their pH levels and...

    $5 - $10 per group Ages 11 - 18 1 to 4 weeks
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    New Jersey Department of Education
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    In this investigation learners explore the differences between, and interdependence of, living and nonliving elements in a water ecosystem. Learners identify biotic (living) and abiotic (nonliving)...

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes
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    Lawrence Hall of Science
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    In this activity, learners observe mixtures of sand samples glued to note cards, and consider how sand can differ in size, shape, and color, and where it comes from. The goal is to help learners...

    1 cent - $1 per group Ages 4 - adult 10 to 30 minutes
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    4-H
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    In this ecology activity, learners make a model water-based ecosystem called a terraqua column. The column (in a large soda bottle) includes pond water, duckweed, sand or gravel, and small snails....

    Over $20 per group Ages 11 - 14 1 to 2 hours