Waboba is the original water bouncing ball, designed in Sweden.Renown worldwide for its internationally patented superior durability and performance, Waboba balls promote physical, social and cognitive skills. Encourages eye-hand coordination, year-round active play, and approved for special needs use by the National Lekotek Centre, Able Play Rated.The Big Kahuna is Waboba's biggest, most versatile ball yet. At 3.5" in diameter, it is easier for the novice or younger player to grasp, and slower to travel for an easier catch. The soft texture of the ball has excellent properties for persons with special needs. Comes in vibrant, bright blue, green and orange, for an attractive and easy to find ball. Perfect for the lake, pool or beach.