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In this simple activity (on page 7 of the PDF), learners use water and liquid dish detergent to see which one removes lipstick better from an index card.

1 cent - $1 per student Ages 6 - 14 5 to 10 minutes
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In this activity, learners investigate the Earth's rotation and how to tell the time of day without a clock. Thsi simple activity only requires a paper plate, a pencil, and sunshine.

1 cent - $1 per student Ages 4 - 11 4 to 24 hours
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In this activity, learners play an evolution card game to see how selective pressures can affect an organism's evolution.

1 cent - $1 per group Ages 8 - 18 1 to 2 hours
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In this activity (on pages 2-8), learners experience how scientists use classification in their study of animals.

1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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In this activity (posted on March 27, 2011), learners follow the steps to construct a mini zoetrope, a device that produces an illusion of action from a rapid succession of static pictures.

1 cent - $1 per student Ages 6 - 18 1 to 2 hours
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With a coffee filter, a black marker, and a cup of water, discover the secret colors hidden in black ink.

1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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In this activity, learners explore how and why rainbows form by creating rainbows in a variety of ways using simple materials. Learners create rainbows indoors and outdoors.

1 cent - $1 per student Ages 6 - 11 5 to 10 minutes
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This activity shows you how to make a mold terrarium using a jar and leftover food.

1 cent - $1 per group Ages 8 - 14 1 to 4 weeks
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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 make flipbooks of drawings showing the progression of a Total Solar Eclipse.

1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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In this environmental health activity, learners investigate their breathing and pulse rates, and learn how these measurements are affected by physical activity.

1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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Learners model the processes that formed some of Earth's largest mountain ranges: the Himalayas, the Andes, and the Alps.

1 cent - $1 per student Ages 8 - 11 10 to 30 minutes
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This is a demonstration you can use to show learners how valves and pumps work in concert to move blood through the circulatory system.

1 cent - $1 per group Ages 6 - 14 5 to 10 minutes
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In this activity (page 2 of pdf), learners craft a model of a skate egg case and come to understand that cartilaginous fish such as sharks and shakes employ reproductive strategies that differ from th

1 cent - $1 per student Ages 6 - 11 1 to 7 days
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This is an activity to do when there is a solar eclipse!

1 cent - $1 per group Ages 8 - adult 1 to 2 hours
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In this activity (on page 2 of the PDF under GPS: Luge Activity), learners will construct a model hovercraft out of an empty spool and a piece of cardboard.

1 cent - $1 per student Ages 8 - 14 45 to 60 minutes
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In this activity, learners investigate just how small a billionth of a meter is by attempting to cut a paper ruler down to a nanometer-sized sliver.

1 cent - $1 per student Ages 4 - adult 5 to 10 minutes
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Learners place an M&M candy in water and observe what happens. The sugar-and-color coating dissolves and spreads out in a circular pattern around the M&M.

1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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Learners mix a variety of substances with red cabbage juice. The juice changes color to indicate whether each substance is an acid or a base.

1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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In this activity on page 60, learners examine and simulate wildlife entanglement by experiencing what it might be like to be a marine animal trapped in debris.

1 cent - $1 per student Ages 6 - 11 10 to 30 minutes