Play Volleyball in the House! The Officially Licensed USA Volleyball Ollyball was designed for full-speed, full-force indoor play. The ball weighs less than an ounce and absorbs shock with its Patented KrunchCOR construction. Kids can now safely play and practice volleyball in the house in any weather, day or night. This alone is cool. What makes Ollyball the "Ultimate Indoor Play Ball" is that the Ollyball can be colored-in with markers and crayon. Ollyball is a Winner of a Toy of the Year. Ollyball’s Patented KrunchCOR construction was designed for full-speed, full-force indoor play. Ollyball’s durable shell is waterproof and perfect for indoor volleyball! Ollyball’s shell is made from a durable and sustainable up-cycled material which has been called one of the "most sustainable textiles on the planet." COLOR-IN your Ollyball using any marker: water-based, washable, or permanent! Quickly inflate and deflate your Ollyball with the included straw. WINNER of a Toy of the Year, Family Choice Award, and Boys' Life Top 19 Toys.