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This activity was designed for blind learners, but all types of learners can explore the process of extrusion used to produce pipes and wires in industry.

$5 - $10 per group Ages 8 - 18 10 to 30 minutes
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In this activity, learners help a poor cartographer color in the countries on a map, making sure each country is colored a different color than any of its neighbors.

1 cent - $1 per group Ages 6 - 18 30 to 45 minutes
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In this activity (on page 2 of the PDF), learners use art supplies to build models of insects, both real or imagined.

1 cent - $1 per student Ages 4 - 6 10 to 30 minutes
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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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Learners can program a compass to draw a circle by itself using a Pico Cricket, some Legos, and lots of tape! Pico Cricket is required.

Over $20 per group Ages 8 - adult 45 to 60 minutes
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Learners make bell bracelets, place them on their wrists or ankles, and then dance to the rhythms and sounds the bells make. Many cultures use ankle or wrist bells to make music during dancing.

1 cent - $1 per student Ages 4 - 11 10 to 30 minutes
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This activity (on page 3 of the PDF) has learners create models of butterfly wings.

1 cent - $1 per student Ages 4 - 6 10 to 30 minutes
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In this activity, learners use simple materials and basic tools to construct a special toy to explore pendulums. As the head of the toy bobs one way, the eyeballs bob the other way.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes
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In this activity (on the left side of page 5, continued on the right side of page 4 of the PDF), learners make models of colorful butterflies.

1 cent - $1 per student Ages 4 - 6 10 to 30 minutes
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In this activity, learners will create their own simple shadow puppets, and experiment with light and shadow while playing with them.

1 cent - $1 per student Ages 6 - adult 10 to 30 minutes
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In this activity, learners will reuse plastic bags in an interesting way.

free Ages 6 - adult 45 to 60 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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In this activity, learners will experiment with textures, shapes, and materials and create their own unique masterpieces.

$1 - $5 per group Ages 4 - adult 10 to 30 minutes
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In this activity, learners will learn about a person they admire (famous, family or otherwise) or even themselves and create a life-sized silhouette.

$1 - $5 per group Ages 4 - 14 30 to 45 minutes
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In this activity, learners will explore two-dimensional shapes that are found in three-dimensional shapes. Learners will explore geometry, design, color and tool use through this activity.

$1 - $5 per group Ages 4 - 14 30 to 45 minutes
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In this activity, learners will create their own lava lamps. Learners will explore density, effervescence and chemistry through this activity.

$1 - $5 per student Ages 4 - 14 30 to 45 minutes
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In this activity, learners repeat patterns in two and three dimensions to create tessellations.

$1 - $5 per group Ages 8 - 11 1 to 2 hours
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In this activity, learners will learn how to knit using only their hands. Learners will explore patterns and fabrication as well as develop fine motor skills and patience through this activity.

$1 - $5 per student Ages 4 - 14 30 to 45 minutes
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In this activity, learners will create an optical illusion top. Learners will explore color mixing, physics and design through this activity.

$1 - $5 per student Ages 4 - 14 10 to 30 minutes