A must-have for the parents of baby boys, the Weeblock® Tinkle Tinkle Lil' Star from Sozo® is a wee-wee-absorbing sponge for use when changing diapers. Weeblock was invented by the parents of two boys who have developed a useful and fun solution to the inevitable "fountains of youth." Just cover the baby during changing with the Weeblock® and stay dry! Weeblock® is a machine washable sponge covered in soft cotton jersey.