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Create beautiful spirals by drawing a straight line. This sounds crazy, but you can with a turntable (a record player or lazy susan), paper, and pen.

1 cent - $1 per student Ages 4 - 14 5 to 10 minutes
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In this activity, learners create painting machines that can paint moving forwards and backwards.

$1 - $5 per student Ages 8 - 18 30 to 45 minutes
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In this activity, learners design unique tiles and make repeating patterns to create tessellations. This activity combines the creativity of an art project with the challenge of solving a puzzle.

1 cent - $1 per student Ages 11 - 14 1 to 2 hours
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In this mechanical engineering activity, learners design shadow puppets with moving parts and use them to tell stories.

$10 - $20 per group Ages 8 - 14 2 to 4 hours
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Here's a very simple activity if you have paper and scissors: make one cut, unfold, and you have a beautiful star! A great way to learn about polygons and origami mathematics.

1 cent - $1 per student Ages 8 - 18 Under 5 minutes
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In this engineering activity, learners explore simple machines and then build cardboard automata using cams.

$5 - $10 per group Ages 8 - 14 2 to 4 hours
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In this science/art activity, learners create an insignia or emblem for a planet exploration mission.

1 cent - $1 per group Ages 6 - 18 45 to 60 minutes
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Use geometry, a ruler, and a steady hand to create these amazing unfurling paper folds!

1 cent - $1 per group Ages 8 - adult 1 to 2 hours
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"Nature of Dye" allows participants to create their own dyes and art while exploring how chemicals interact and how these interactions can have real-world applications.

Over $20 per group Ages 6 - adult 10 to 30 minutes
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These math posters have questions written on them, such as: How many colors can you name in a minute? or How many seconds can you balance on one foot?

free Ages 4 - 14 30 to 45 minutes
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In this activity, learners construct drawing machines using a cup, some markers, and a battery pack. The markers act as "legs" for the machine, making a drawing that records as it moves.

$5 - $10 per student Ages 8 - 14 45 to 60 minutes
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In this activity, learners stain fabrics--on purpose!

Over $20 per group Ages 11 - 18 1 to 2 hours
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In this activity, learners try to float ink on the surface of water to create a pattern and then capture it with absorbent paper.

Over $20 per student Ages 8 - 18 45 to 60 minutes
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In this activity, learners manipulate film to create homemade movies. Scratch Film, also known as Direct Animation, is the process of drawing and scratching designs directly onto film.

Over $20 per group Ages 11 - adult 2 to 4 hours
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In this activity, learners will exercise their imaginations and artistic skills. Appropriate for all ages, learners will create unique pieces to jumpstart storytelling sessions.

$1 - $5 per group Ages 4 - adult 45 to 60 minutes
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In this activity, learners will use chemistry to create a night sky watercolor painting. They will experiment to learn the effects of mixing crayon, salt, and lemon juice with water color paints.

$5 - $10 per student Ages 4 - adult 30 to 45 minutes
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In this activity, learners will use clear nail polish and the power of chemistry to create paper with a rainbow sheen.

$1 - $5 per group Ages 6 - 14 5 to 10 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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This is a quick activity (on page 2 of the PDF under Butterfly Wings Activity) that illustrates how nanoscale structures, so small they're practically invisible, can produce visible/colorful effects.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners use information gathered from a variety of sources to design and make their own insect.

1 cent - $1 per student Ages 4 - 14 45 to 60 minutes