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This design challenge is an open-ended exploration of linkages, a group of parts connected by hinges, and the types of motion they can create.

$1 - $5 per student Ages 8 - adult 10 to 30 minutes
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In this design challenge, learners will engineer a structure and see if it can survive an earthquake they create.

free Ages 8 - adult 1 to 2 hours
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In this activity, learners will rate the day, a book, or something else on a scale from -2 to 2. This activity works well for groups of all ages.

free Ages 4 - 14 5 to 10 minutes
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In this activity, learners experiment with different variables in making hollandaise sauce to achieve the correct texture and consistency.

$10 - $20 per student Ages 11 - 14 45 to 60 minutes
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In this fun and imaginative writing assignment (page nine of the pdf), students will flex the creative side of their brains to learn more about the laws of motion and the scientific process.

free Ages 8 - 11 45 to 60 minutes
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In this activity, learners construct drums out of everyday containers (like bowls or food containers) and shrink wrap. Learners use a hair dryer to affix and tighten the shrink wrap to the container.

$5 - $10 per student Ages 6 - 11 5 to 10 minutes
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Align four color transparencies, each one a single color (cyan, magenta, yellow, and black), and see a beautiful full color image.

1 cent - $1 per student Ages 6 - 14 Under 5 minutes
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This activity has three story puzzles learners can solve to learn about life in the Arctic.

1 cent - $1 per student Ages 4 - 8 30 to 45 minutes
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Learners make their own paper using old newspaper. Learners can make their paper colorful by adding construction paper.

1 cent - $1 per group Ages 4 - 11 1 to 2 hours
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In this outdoor activity and game, learners collect and sort leaf samples to determine how many types of plants grow in the activity site.

$5 - $10 per group Ages 6 - 14 45 to 60 minutes
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In this activity, learners build inexpensive kaleidoscopes using transparency paper and foil (instead of mirrors).

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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In this activity, learners build a hot air balloon using just a few sheets of tissue paper and a hair dryer.

$1 - $5 per student Ages 6 - 18 30 to 45 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
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In this activity, learners explore why animals, specifically dinosaurs, live in families.

$1 - $5 per group Ages 6 - 8 45 to 60 minutes
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The Ancient Egyptians used a naturally-occurring salt from the banks of the Nile River, called natron, to mummify their dead.

$5 - $10 per group Ages 8 - 18 1 to 4 weeks
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This activity shows learners how computers use numbers to represent pictures. A grid is used to represent the pixels (short for picture elements) of a computer screen.

1 cent - $1 per student Ages 6 - adult 30 to 45 minutes
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In "Chemistry is Colorful" learners explore different materials through paper chromatography.

$5 - $10 per group Ages 6 - adult 10 to 30 minutes
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Learners build 3D representations of constellations, which show not just the position of the stars as seen from Earth but also their relative distance from Earth.

$5 - $10 per student Ages 8 - 11 10 to 30 minutes
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This activity uses a special paper that can create images with exposure to the Sun. Collect objects of different shapes and sizes and use them to make interesting patterns on your sun print.

$5 - $10 per group Ages 4 - 11 45 to 60 minutes
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Learners estimate how many small triangles will fill a larger shape. Then they use a triangle stamp (or stencil made from a file folder) to fill the larger shape with triangles.

$1 - $5 per student Ages 8 - 11 10 to 30 minutes