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    Computer Science Unplugged
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    This activity about cryptographic techniques illustrates a situation where information is shared, and yet none of it is revealed. A group of learners will calculate their average age without anyone...

    1 cent - $1 per group Ages 11 - adult 5 to 10 minutes
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    NISE Network
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    In this activity, learners examine nanoscale structures of common things. Learners flip between macro and nanoscale images of familiar objects to learn about some ways that nanotechnology is...

    $1 - $5 per group Ages 4 - adult 5 to 10 minutes
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    Arizona Science Center
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    This activity (page 2) draws upon a familiar, computer-based concept related to visual resolution: pixilation. The sharpness of a digital image is determined by the density of illuminated points on...

    free Ages 11 - 14 5 to 10 minutes