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    Computer Science Unplugged
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    This activity about cryptographic techniques illustrates how to accomplish a simple, but nevertheless seemingly impossible task—making a fair, random choice by flipping a coin between two people...

    $1 - $5 per group Ages 8 - 18 30 to 45 minutes
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    Computer Science Unplugged
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    In this activity, learners conduct a simulation exercise related to public key encryption and try to intercept a message sent between two learners. This activity works with two learners but is most...

    free Ages 11 - 18 30 to 45 minutes
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    Computer Science Unplugged
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    In this activity, learners listen to songs and decode hidden messages based on the same principle as a modem. As a final challenge, learners decode the binary messages in a music video. This is an...

    free Ages 6 - 18 30 to 45 minutes
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    Computer Science Unplugged
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    In this activity, learners use a fictitious map of "Tourist Town" and counters to problem solve how to place ice-cream vans on street intersections so that every other intersection is...

    $1 - $5 per group Ages 11 - 18 45 to 60 minutes
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    Twin Cities Public Television
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    In this technology activity, learners explore digital imaging and pixels. Learners "transmit" an image to a partner by creating an image on grid paper. Learners then use a code of zeroes...

    1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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    Computer Science Unplugged
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    In this outdoor activity, learners use pegs (like tent pegs) and string or elastic to simulate drill sites and roads in Northern Canada. Learners are challenged with figuring out how to connect the...

    $5 - $10 per group Ages 11 - 18 30 to 45 minutes
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    Arizona Science Center
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    In this activity, learners apply the concepts of pixilation and pointillism to the world of biomedical science. They learn how DNA microarrays and supercomputers help in disease detection by...

    $5 - $10 per group Ages 11 - 14 1 to 2 hours
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    NASA
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    In this pencil and paper activity, learners work in pairs and simulate how astronomical spacecraft and computers create images of objects in space. Learners will discover the process of how light...

    1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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    Computer Science Unplugged
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    In this puzzle, learners investigate the decisions involved in linking a network between houses in a muddy city. It can lead on to a discussion of minimal spanning tree algorithms for optimizing...

    1 cent - $1 per student Ages 8 - 18 30 to 45 minutes
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    Computer Science Unplugged
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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. Through this exercise, learners...

    1 cent - $1 per group Ages 6 - 18 30 to 45 minutes

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