A chemistry set serves as the perfect toy to help a child unlock the secrets of science. While old-school chemistry sets gave kids a leg up in school and let them experiment with different mixtures and reactions, modern toy makers offer plenty of specialized sets to attract a kid's eye. For example, some contain only ingredients that kids can safely consume, allowing your budding scientist to mix up foaming and fizzing drinks or crystallized candies [source: Discovery.com]. Spa-based chemistry sets consist of various fragrances, soaps and lotions, so kids can practice science skills as they mix up batches of bath products. Other modern chemistry sets focus on experiments with substances that glow in the dark, or different types of gross, slimy or gooey substances -- all guaranteed to pique a child's interest, regardless of his or her curiosity for science.