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In this activity on page 8 of the PDF, learners investigate vitamin C. Learners conduct a chemistry experiment to determine if Tang drink mix or orange juice contains more vitamin C.

$5 - $10 per student Ages 8 - 14 45 to 60 minutes
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In this activity, learners use pegboard and straws to build a three-dimensional model of the periodic table.

$5 - $10 per student Ages 14 - 18 10 to 30 minutes
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In this matchmaking activity (on page 2 of the PDF under GPS: Animal Scent Activity), learners will each have a scented cotton ball taped to their shoulder. The scent (e.g.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners explore acids and bases by preparing six solutions that combine vinegar and ammonia, ranging from acid (all vinegar) to base (all ammonia).

$5 - $10 per group Ages 8 - adult Under 5 minutes
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In this activity best suited as a demonstration, learners observe that when a piece of iron gets too hot, it loses its ability to be magnetized.

$5 - $10 per group Ages 11 - 18 10 to 30 minutes
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In this activity about saturation (page 1 of PDF under SciGirls Activity: Sand Dunes), learners will build a series of sand castle towers using a 16 oz cup.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners create colorful bead bracelets to wear outside while searching for matching colors in plants. Learners will be surprised by the variety of colors in nature.

$5 - $10 per group Ages 4 - 8 45 to 60 minutes
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In this optics activity, learners discover that not all shadows are black. Learners explore human color perception by using colored lights to make additive color mixtures.

$5 - $10 per group Ages 6 - 18 5 to 10 minutes
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This is an activity in which learners explore the effects of gravity, motion and momentum while creating art.

$5 - $10 per group Ages 4 - 6 10 to 30 minutes
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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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Water treatment on a large scale enables the supply of clean drinking water to communities.

$5 - $10 per group Ages 11 - adult 45 to 60 minutes
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In this activity, learners investigate vitamin C.

$5 - $10 per group Ages 8 - adult Under 5 minutes
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In this activity, learners use bubbles to investigate the structure and unique properties of cell membranes. Bubbles serve as macroscopic models that mimic the cells' phospholipid bilayers.

$5 - $10 per group Ages 11 - 18 45 to 60 minutes
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In this activity, learners discover how sediment is affected in an oil spill. Learners investigate the differences between heavy and light oil as well as the differences between different sediments.

$5 - $10 per group Ages 8 - 11 10 to 30 minutes
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In this activity, learners use simple tools to build a bookshelf with a built-in bookend.

$5 - $10 per student Ages 11 - 18 1 to 2 hours
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In this activity (page 10 of PDF), learners approximate the area of the uppermost cross section of an impact crater using a variety of square grids.

$5 - $10 per student Ages 8 - 14 45 to 60 minutes
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In this activity, learners explore sound by constructing their very own bagpipe instrument.

$5 - $10 per student Ages 6 - 11 45 to 60 minutes
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Water sticks to all kinds of things in nature — flowers, leaves, spider webs - and doesn't stick to others, such as a duck's back.

$5 - $10 per group Ages 8 - 18 30 to 45 minutes
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In this nanoscience activity, learners discover that it's easy to pour water out of a regular-sized cup, but not out of a miniature cup.

$5 - $10 per group Ages 4 - adult 5 to 10 minutes
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After a discussion about what a parachute is and how it works, learners create parachutes using different materials that they think will work best.

$5 - $10 per group Ages 11 - 14 45 to 60 minutes