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    Twin Cities Public Television
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    In this activity (page 1 of the PDF), learners will use a home video camera with a “night vision” mode to test how various inks appear outside the spectrum of visible light. In a darkened room,...

    Over $20 per group Ages 8 - 14 30 to 45 minutes
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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 how hairs from a crime scene are matched to suspects. Learners each take a single hair from their own head, then put it...

    Over $20 per group Ages 8 - 14 1 to 2 hours