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Build a glider that uses the same physics as a curve ball, for less than a dime.

1 cent - $1 per student Ages 8 - 14 5 to 10 minutes
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In this activity (page 7 of pdf), learners research tide pool ecosystems, and then create brochures that "advertise" these environments.

1 cent - $1 per student Ages 8 - 11 2 to 4 hours
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During this lesson, learners will determine their blood pressure and learn about systolic and diastolic pressures.

1 cent - $1 per group Ages 8 - 18 30 to 45 minutes
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In this activity about neuron/target muscle recognition (page 44 of the PDF), learners arranged in two rows facing away from each other use string to simulate neural development.

1 cent - $1 per group Ages 8 - 18 45 to 60 minutes
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In this activity, learners discover that two pendulums suspended from a common support will swing back and forth in intriguing patterns, if the support allows the motion of one pendulum to influence t

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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Learners create an Incan counting device called a quipu (pronounced kee-poo).

1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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In this art-related activity, learners make a coin rubbing—a process similar to what archeologists may do with ancient artifacts. This activity can be used in connection with a history or art lesson.

1 cent - $1 per group Ages 6 - 11 10 to 30 minutes
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In this activity, learners heat ice and water of the same temperature to get a hands-on look at phase changes. This is an easy and inexpensive way to introduce states of matter and thermodynamics.

1 cent - $1 per group Ages 8 - 14 5 to 10 minutes
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Extract your DNA from your very own cells! First, learners swish salt water in their mouth to collect cheek cells and spit the water into a glass.

1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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In the related activity called "Colors Collide or Combine," learners are intrigued by the apparent "line" that forms where colors from M&M coatings meet but do not mix.

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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In this activity, learners investigate visual perception as well as plan and conduct their own experiments.

1 cent - $1 per group Ages 8 - 18 1 to 2 hours
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In this activity, learners discover that they can create a lens from a water drop. Learners test their lens by looking at words or pictures.

1 cent - $1 per group Ages 4 - 11 10 to 30 minutes
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In this activity, learners work together to interpret an "alien message." The group pretends that this is the only message from an imaginary civilization, so there is no "key" and thus no "correct" wa

1 cent - $1 per group Ages 6 - adult 10 to 30 minutes
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In this "gross" activity (on pages 34-46), learners make a life-size model of a human digestive tract, and follow the life of a beef tapeworm as it makes its way through.

1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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In this genetics meets math activity, learners take inventories of their own easily-observable genetic traits and compare those inventories with other learners in groups.

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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You may have tried to throw a curveball or a slider, or even a screwball, with an ordinary baseball and found it difficult to do.

1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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In this three-part activity, learners use paper to explore Bernoulli's Principle — fast-moving air has lower pressure than non-moving air.

1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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What keeps bubbles and other things, like airplanes, floating or flying in the air?

1 cent - $1 per student Ages 4 - 14 10 to 30 minutes
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Learners compare a life-size drawing of a Tyrannosaurus rex head and a full-size Sinornithosaurus body to understand that dinosaurs varied in size.

1 cent - $1 per group Ages 8 - 11 1 to 2 hours
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Use grape juice, baking soda, water and vinegar to make acid and base indicator paper! This activity contains a recipe and instructions for the indicator paper.

1 cent - $1 per student Ages 4 - 11 10 to 30 minutes