Get Ready to Discover the Exciting World of Science – Seatbelts, Everyone! Based on the popular book series, these fun and exciting kits are sure to engage children of all ages! Ms. Frizzle and her class take students on a wild ride into the spectacular world of science. Each kit comes with a colorful manual and provides challenging and exciting hands-on experiments. The World of Germs. Grow bacteria and fungi, test antibiotics, make a fungus bubble, explore antibiotics, grow mold, wake up fungi, cultivate bacteria in yogurt, use yeast to inflate a balloon, and more!