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In this activity, learners working in pairs saturate a cotton ball using water drops from an eyedropper to demonstrate the high water capacity of clouds.

1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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In this activity, learners investigate how different materials repel or absorb water. Learners use spray bottles to explore how everyday items like sponges, cardboard, feathers, etc.

$1 - $5 per group Ages 4 - 8 30 to 45 minutes
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In this activity, learners investigate and compare the rate of drying in different conditions.

$1 - $5 per group Ages 6 - 11 30 to 45 minutes
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In this experiment, learners separate different types of molecules in marker inks (using a technique called "thin layer chromatography").

$1 - $5 per student Ages 4 - 8 30 to 45 minutes
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In this outdoor, night activity, learners track nocturnal animals' footprints, droppings and other signs of their presence.

Over $20 per group Ages 6 - 14 1 to 7 days
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In this activity, learners make their own bug boxes and test the habitat preference of selected "minibeasts" (bugs).

$5 - $10 per student Ages 6 - 14 2 to 4 hours
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In this activity, learners discover if carbon dioxide has an effect on temperature.

1 cent - $1 per group Ages 6 - 14 1 to 2 hours
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In this activity, learners experiment with the density of ice, water, and oil. Learners will discover that the density of a liquid determines whether it will float above or sink below another liquid.

$1 - $5 per student Ages 6 - 11 10 to 30 minutes
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In this activity (located on page 9 of the PDF), learners are introduced to Aesop's fable, "The Crow and the Pitcher." In the story, a clever crow drops pebbles into a pitcher to cause the water level

free Ages 6 - 11 45 to 60 minutes
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In this activity, learners use oil, water, food coloring and antacid tablets to create a bubbling lava lamp. Use this activity to introduce concepts related to density, hydrophobicity vs.

$5 - $10 per student Ages 6 - 11 10 to 30 minutes
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In this activity, learners conduct three experiments to examine temperature, the different stages of the water cycle, and how convection creates wind.

$1 - $5 per group Ages 4 - 11 45 to 60 minutes
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In this activity, learners explore how hot and cold water move. Learners observe that temperature and density affect how liquids rise and fall.

$1 - $5 per student Ages 4 - 11 45 to 60 minutes
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In this activity, learners observe how salinity affects the freezing point of water by making and enjoying ice cream.

$5 - $10 per group Ages 6 - 14 30 to 45 minutes
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In this activity, learners explore and experiment how we can use our bodies everyday to get from one place to another.

1 cent - $1 per group Ages 4 - 8 10 to 30 minutes
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In this activity, learners investigate wind by comparing the force of wind in different locations. Learners build wind-o-meters out of wooden sticks and strips of paper.

$1 - $5 per group Ages 6 - 11 45 to 60 minutes
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In this activity, learners observe the effect of transpiration as water is moved from the ground to the atmosphere.

1 cent - $1 per group Ages 6 - 14 2 to 4 hours
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In this biology/ecology activity, learners construct a terrarium out of a tennis ball container. This terrarium is unique because it never has to be watered.

$1 - $5 per student Ages 6 - 11 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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In this activity, learners follow a recipe to create play dough scented with fruit-flavored drink mix.

$1 - $5 per group Ages 4 - 8 30 to 45 minutes
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In this activity, learners explore properties of water and watch evaporation happen by "painting" with water in the sun.

$5 - $10 per group Ages 4 - 8 10 to 30 minutes