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    Twin Cities Public Television
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    This activity (on page 2 of the PDF) is a full inquiry investigation into sound. Groups of learners will use a decibel meter or a simple set of benchmark sounds to record and quantify sound levels...

    Over $20 per group Ages 8 - 14 2 to 4 hours
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    Twin Cities Public Television
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    This activity (on page 2 of the PDF) is a full inquiry investigation into hovercraft engineering and design optimization. Groups of learners with access to power tools and a wood shop will build a...

    Over $20 per group Ages 8 - 14 1 to 7 days