Champs are the next generation in slow-bouncing pressureless tennis balls. They slow down play to help beginning children and adults control the ball and succeed faster than ever. And, since they are pressureless, you don't have to worry about them going flat. They will maintain a consistent bounce and outlast regular tennis balls by more than 10:1. Packaged half and half in 2 color combinations: yellow/green and yellow/orange, tremendously adding to the variety of possible games and drills. Comes with 24-page games booklet featuring dozens of games for children. Compare to all slow-bouncing balls, including Pen Stars!