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In this design challenge activity, learners invent an emergency shelter that can fit a person and is sturdy and quick to build.

$10 - $20 per group Ages 8 - 14 30 to 45 minutes
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In this activity, learners light an LED with five cents. Learners use two different metals and some sour, salty water to create a cheap battery.

1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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This laboratory exercise is designed to show learners how DNA can easily be extracted from yeast using simple materials.

$5 - $10 per group Ages 11 - 18 45 to 60 minutes
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Walk a toy to the edge of its doom, maybe it'll fall off the edge of a table, but it will safely stop right before falling.

free Ages 6 - 14 Under 5 minutes
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In this activity, learners will create their own percussion instrument with recycled materials. Learners will explore design, fabrication, cause and effect and sound through this activity.

$1 - $5 per student Ages 4 - 14 30 to 45 minutes
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In this activity, learners will dip different items in paint and then roll those items down a ramp. Learners will use science process skills such as observations and experimenting.

$5 - $10 per group Ages 4 - 6 10 to 30 minutes
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In this activity, learners discover that sand is the major ingredient in glass.

$5 - $10 per group Ages 8 - 11 45 to 60 minutes
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In this activity, learners explore how engineering has impacted the development of bridges over time, including innovative designs and the challenge of creating bridges that become landmarks for a cit

$1 - $5 per group Ages 8 - 18 1 to 2 hours
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In this activity (on pages 20-23 of PDF), learners build a model of a power plant using simple materials.

$1 - $5 per student Ages 11 - 18 45 to 60 minutes
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In this optics activity, learners use a shoebox, colored cellophane and sunlight to "change" the colors of gumballs. Learners will be surprised when the green and blue gumballs appear black!

$1 - $5 per student Ages 6 - 11 10 to 30 minutes
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In this activity, learners use Teflon (PTFE) tape to write secret messages.

$1 - $5 per student Ages 6 - 18 10 to 30 minutes
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Learners are challenged to create solutions that conduct electricity and make a buzzer buzz (or an LED light up).

Over $20 per group Ages 4 - 14 10 to 30 minutes