polyurethane Smaller size. It is 40% smaller in volume than ragular moon balls, but still bounces out of this world The bouncing ball family has been expanded with a special member, as in addition to the well-known Waboba Moon, Mini Moon Bouncing have now reached space and popularity. The ball offers classic quality, extreme bounce and sound effect in a glamorous mini size and bold pastel colors. Try this fun palm yourself, play with the family, or simply toss and try to break your own height record Colors may vary. Recommended for children 5 years and over. Size: 2.2 in Number of players: 1, 1 - 4