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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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    New York Hall of Science
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    This activity lets you program your 'robot' (a willing friend) to pick up and dispose of some 'toxic waste' using as few commands as possible. Learners create command cards ...

    1 cent - $1 per group Ages 8 - 18 10 to 30 minutes