This toy ball set includes the sun and the 9 planets in our solar system! Each planet can be used to play the classic game of marbles, or used as an out space learning toy. This is perfect for science teachers, or budding astronomers or astronauts who love space. Includes 10 Marbles that represent Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. Size - One 35mm size Boulder (the Sun) , Nine 25mm size Shooters (Planets). Made of high quality glass. Includes 10 display rings to showcase the Planet Marbles on a desk or table. Ages 5+. Warning: Chocking Hazard. Contains a small ball.