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This demonstration can be used to help learners visualize DNA by lysing (breaking open) bacterial cells on a slide and “stringing up” the DNA with a toothpick in less than one minute.

$10 - $20 per group Ages 11 - 18 5 to 10 minutes
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Visitors observe a tray holding a crystal-covered brick. The crystals were created by evaporation of a solution containing liquid bluing, ammonia, and salt.

$1 - $5 per group Ages 6 - 14 5 to 10 minutes