100% eeBoo means Robot Explorers Solar System Game is eco-friendly (75% recycled materials), plastic free, uses soy-based inks and is a whole lot of fun! Robots race around the sun to all eight planets (we sure miss Pluto) looking for specimens for the rocket lab. Playing in the solar system? Enhance patience and number skills with game play while going to the moon! Board measures 18" by 18" inches. Ages 5-8.