Encourage your aspiring engineer to use their imaginations to build with the Magformers 30 piece Rainbow Solids Clear Set. Designed for ages 3 years and older, Magformers is a great learning tool for children to develop skills like fine motor, creativity, and cognitive and thinking skills. Magformers are made from magnets so when you build, the pieces magically snap together. Want to start over? Just take them apart and begin again. Each rainbow colored piece has a clear inset.