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After exploring the "World of Germs," your grandkids will fully understand why they're asked to use tissues and wash their hands before dinner. This activity set, part of the larger Young Scientists Club, provides tools like test tubes and petri dishes to run ten different experiments, galvanizing the good times from otherwise icky substances like mold and fungi. While you and your grandchild learn to cultivate bacteria in yogurt, test antibiotics, and use yeast to inflate a balloon with the fully equipped kit, even the biggest germophobes will be converted to curious biotech wannabes. Maybe after all the "ew," and "aah," they'll be prompted to clean themselves up for a change.