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POOF-SLINKY: Scientific Explorer: Disgusting Science Kit. This exceptional series of home science kits is based on the nationally recognized Great Explorations in Math and Science (GEMS) program pioneered at UC Berkley’s Lawrence Hall of Science. Acclaimed for excellence as a teaching resource. Why do your feet really stink? What kinds of creatures actually live on you? What makes you pass gas? And many more questions answered. This package contains four petri dishes one magnifier four cotton swabs 2oz/56g gelatin 1oz/28g sugar 0.25oz/7g baking yeast 0.2oz/5ml red coloring 0.2oz/5ml green coloring one rubber balloon one small plastic bag and an activity guide. Recommended for children ages 8 and up.