ENCOURAGE open-ended play that lets kids imaginations explore a galaxy of their own designs! After they finish building kids can explore cause-and-effect and other early physics concepts with the set's spinning gears. Manufacturered by Learning Resources. This 77-piece set includes interlocking bases gears connectors a handle astronauts planets a sun a spaceship a flag stickers and an activity guide. Ages 4+ STEM building set boosts kids critical-thinking and early engineering skills with open-ended play inspired by outer space exploration.