Great hands on learning and educational science STEM kit for boys and girls which encourages STEM learning for ages 5-12 3 complete kits in one box Moving joints, mapping taste buds, and optical illusions will delight all young scientists. Make a hinge and ball-and-socket joint, study and recreate an X-ray. Map taste buds. Find cold and hot receptors. Compare spinning glitter to the ear. Make a vocal cord model. Create optical illusions while studying sight and light. All our mind blowing science kits are developed by a team of Harvard graduates, scientists, and educators and are put on the market after it has passed the ultimate test-approval by multiple teams of Young Scientists at our annual camps. Each kit comes with all supplies needed (except for common household items) and detailed experiment manual with guidance to make this educational STEM kit for kids a great learning toy.