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In this activity, learners use simple materials to build their own compass.

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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In this activity, learners explore the principles of magnetism by observing how various materials interact with magnets and superconductors.

$1 - $5 per group Ages 14 - adult 10 to 30 minutes
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In this activity, learners explore how engineers work in a team to solve problems.

$1 - $5 per group Ages 8 - 18 1 to 2 hours
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In this activity about potential and kinetic energy, learners get to roll a can across the floor and then watch it roll back to them as if by magic. This activity is always great for looks of wonder!

$1 - $5 per student Ages 11 - 14 10 to 30 minutes
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Investigate the interaction of liquids of different densities and experiment with wave patterns with this hands-on activity.

$1 - $5 per group Ages 6 - 11 5 to 10 minutes
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In this activity, learners will explore how water affects marker on filter paper. Learners will use science process skills such as making observations and predictions as they explore color.

$1 - $5 per student Ages 4 - 8 5 to 10 minutes
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In this activity, learners investigate soil erosion. Learners set up a simulation to observe how water can change the land and move nutrients from one place to another.

$1 - $5 per student Ages 6 - 11 10 to 30 minutes
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In this activity, learners discover that there is space between molecules even in a cup "full" of water. They first fill a cup with marbles, and then add sand to fill the gaps between the marbles.

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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In this tasty activity, learners make their own ice cream any day of the year in an exploration of heat and cold. Highlights include freezing and melting and the transition from liquid to solid.

$1 - $5 per student Ages 6 - 11 45 to 60 minutes
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In this activity, learners explore static electricity and electrical charges while experimenting with an inflated balloon, unflavored gelatin powder, and a wool sweater.

$1 - $5 per student Ages 6 - 11 Under 5 minutes
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In this activity, learners carry out a scientific investigation of dust in their classroom. Learners produce an analysis on graph paper of the dust they collect over the course of a few days.

$1 - $5 per group Ages 11 - 18 1 to 7 days
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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 delicious activity, learners get to make, taste-test and compare their own "brands" of homemade strawberry ice cream.

$1 - $5 per student Ages 6 - 11 45 to 60 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 (on page 6 of the PDF), learners plot the path of the sun's apparent movement across the sky on two days, with the second day occurring two or three months after the first.

$1 - $5 per group Ages 8 - 14 1 to 7 days
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In this activity (on page 2 of the PDF), learners make a plastic protein polymer from milk. Adding vinegar to milk causes the protein casein to solidify or curdle.

$1 - $5 per student Ages 6 - 14 1 to 7 days
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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 about the relationship between food and energy (page 1 of PDF), learners observe and quantify the growth of yeast when it is given table sugar as a food source.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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The demonstration/experiment provides quick proof that air has mass.

$1 - $5 per group Ages 8 - 14 5 to 10 minutes
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In this activity, learners test the Law of Reflection based on experimental evidence. Learners produce raw data and explanations based on their data: pencil tracings of incident and reflection rays.

$1 - $5 per group Ages 14 - 18 45 to 60 minutes