Zometool Kepler's Kosmos was inspired by German mathematician, astronomer and astrologer Johannes Kepler (1571-1630) who believed that the relationships between the 5 platonic solids governed the order of the universe. He believed the planets were arranged in their orbits through the relationships between the 5 "perfect" three-dimensional forms: the Platonic Solids. He turned out to be wrong, but in the process of trying to prove his theory he laid down the foundation for modern astronomy. Build a beautiful model of the 5 Platonic Solids, nested in a configuration proposed by renowned mathematician John H. Conway. All components are 100% made in the USA, inter-compatible, and come with a lifetime manufacturers warranty. Zometool is the construction set that kids and Nobel Prize winners get hooked on.