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In this activity, learners will experiment with changing flower colors. Learners will investigate the effects of acids and bases on flower colors.

$1 - $5 per group Ages 4 - adult 10 to 30 minutes
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In this activity, learners will plan a snack within a budget. With a $20 limit (theoretical) to spend on snack for everyone, learners look over grocery store circulars and make their shopping lists.

free Ages 6 - 14 45 to 60 minutes
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Learners use their knowledge of color changes with red cabbage indicator to neutralize an acidic solution with a base and then neutralize a basic solution with an acid.

1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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In this activity, learners will be able to measure themselves in nanometers. A nanometer is a billionth of a meter, a unit of measurement used in nanotechnology.

free Ages 6 - 18 5 to 10 minutes
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Many people get water from a source deep underground, called groundwater.

$10 - $20 per group Ages 6 - adult 10 to 30 minutes
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In this activity, learners construct speedy vehicles made out of paper plates and powered by twisted rubber bands.

$1 - $5 per student Ages 6 - 18 45 to 60 minutes
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In this activity, learners use their sense of smell to explore the world on the nanoscale.

$5 - $10 per group Ages 4 - adult 5 to 10 minutes
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In this tabletop board game, players will represent a team of scientists and engineers sending a spacecraft on a mission to space.

1 cent - $1 per group Ages 4 - adult 30 to 45 minutes
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In this activity, learners conduct an experiment to explore how water flows up from a tree's roots to its leafy crown.

$1 - $5 per student Ages 6 - 14 1 to 2 hours
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Most people will break a bone in their body at some point in their life, but how much force does it take to break one?

$10 - $20 per group Ages 6 - adult 10 to 30 minutes
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In this activity, learners will explore the physics of liquids and gas by playing with both! Learners of any age use their own breath to move drops of water across a smooth wax paper surface.

1 cent - $1 per group Ages 4 - adult 5 to 10 minutes
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In this activity, learners play with a fuzzy-colored dot that has no distinct edges seems to disappear. As learners stare at the dot, its color appears to blend with the colors surrounding it.

$1 - $5 per student Ages 6 - 14 5 to 10 minutes
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In "Exploring the Solar System: Stomp Rockets," participants learn about how some rockets carry science tools—not scientists—into space, and how a special kind of rocket called "sounding rockets" can

1 cent - $1 per student Ages 6 - 14 5 to 10 minutes
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In this activity on page 4 of the PDF, learners investigate the importance of washing their hands.

$1 - $5 per student Ages 6 - 14 10 to 30 minutes
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In this activity on page 4 of the PDF (Water in Our World), learners conduct some quick and easy tests to determine the differences between water and other liquids that look very similar to water.

$1 - $5 per student Ages 6 - 14 10 to 30 minutes
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In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

free Ages 6 - 18 Under 5 minutes
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Build and test a scale model of a rainforest canopy walkway.

$1 - $5 per student Ages 6 - 14 10 to 30 minutes
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In this activity, learners will create their own simple shadow puppets, and experiment with light and shadow while playing with them.

1 cent - $1 per student Ages 6 - adult 10 to 30 minutes
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In this activity, learners explore and compare the buoyant properties of materials found in nature and in human-made materials.

1 cent - $1 per group Ages 4 - adult
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In this activity, learners build a bird that flies in place with help from a motor, wire, and some straws.

$5 - $10 per student Ages 6 - 14 30 to 45 minutes