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Make a quick and easy filter from household materials. A filter will catch any solids suspended in a liquid and filter them out. By using a filter, learners can discover amazing things.

1 cent - $1 per student Ages 4 - 8 5 to 10 minutes
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In this activity, learners investigate the properties of plastic bags. Learners find out what happens when they slowly push a pencil through a plastic bag filled with water.

1 cent - $1 per group Ages 4 - 11 10 to 30 minutes
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In this activity about magnetism (page 13 of the pdf), learners will experiment with magnets to explore how water and other liquids affect the strength of magnetic fields.

$1 - $5 per group Ages 6 - 11 10 to 30 minutes
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Ocean acidification is a problem that humans will have to deal with as we release more and more carbon dioxide into the atmosphere.

$1 - $5 per student Ages 8 - 18 5 to 10 minutes
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Young learners investigate and observe the properties of three liquids -- water, vegetable oil, and corn syrup. They use their senses to collect data and ask and answer questions.

$1 - $5 per group Ages 4 - 8 10 to 30 minutes
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In this activity, learners will explore globes of frozen water to learn how to ask and then answer 'investigable' questions. The activity web page includes a short video demonstration.

$1 - $5 per group Ages 8 - adult 45 to 60 minutes
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In this activity, learners explore the real science behind an egg drop "magic trick." Learners will wow their families by harnessing gravity, friction and motion to make 3 eggs fall off of their pedes

$1 - $5 per student Ages 6 - 14 10 to 30 minutes
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In this activity, learners create channel features with flowing water, comparing their observations to real images of Mars and Earth taken by satellites/orbiters.

Over $20 per group Ages 8 - 14 10 to 30 minutes
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In this physics demonstration, learners will be surprised when a handkerchief holds water in an upside-down glass.

free Ages 4 - adult Under 5 minutes
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In this activity, learners will experiment with different materials that can melt and change ice.

1 cent - $1 per student Ages 4 - 6 10 to 30 minutes
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In this activity, learners mix water, cooking oil, and liquid food coloring to create beautiful colored designs in a cup. Use this activity to explore liquid density and solubility.

$1 - $5 per student Ages 6 - 11 5 to 10 minutes
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In this activity, learners make their own rock candy. Crystals will grow from a piece of string hanging in a cup of sugar water. The edible crystals may take up to a week to form.

1 cent - $1 per student Ages 6 - 18 1 to 7 days
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In this activity, learners try pouring water out of a regular cup and a miniature cup. It’s harder than it sounds! Learners discover that different forces dominate at different size scales.

$5 - $10 per group Ages 4 - adult 5 to 10 minutes
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In this hands-on botany activity, learners sprout vegetables in film canisters.

1 cent - $1 per student Ages 4 - 11 1 to 4 weeks
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In this activity, learners explore inertia as they attempt to whip a strip of paper out from under two coins dangling on the rim of a water glass.

free Ages 6 - 14 5 to 10 minutes
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In this edible experiment, learners pour "Magic Shell" chocolate into a glass of cold water. They'll observe as pillow shaped structures form, which resemble lavas on the sea floor.

$1 - $5 per student Ages 8 - 18 5 to 10 minutes
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In this activity about phase change and condensation, learners boil water in an empty pop bottle in the microwave.

1 cent - $1 per group Ages 8 - 14 Under 5 minutes
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In this botany activity, learners will create an experiment about seed germination. This activity gives students an opportunity to explore how seeds germinate and react to surrounding conditions.

$1 - $5 per student Ages 8 - 11 1 to 7 days
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In this activity, learners compare frog eggs to chicken eggs to better understand why frog eggs need water. Learners compare a boiled chicken egg to "frog eggs" represented by boiled tapioca.

$1 - $5 per student Ages 4 - 14 4 to 24 hours
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In this activity, learners find out what happens when they cover leaves with pieces of black construction paper. This activity shows learners that plants need sunlight to survive.

$1 - $5 per group Ages 4 - 11 1 to 7 days