Made from a super squishy, lightweight material that's more elastic than the average inflatable, Wubble Sports are engineered to be light and bouncy! Whack a squooshy and buoyant baseball with an inflatable 2-foot bat! Wacky fun, indoors or out, kids will laugh themselves silly - even when they're hit. They require no pump, and provide truly innovative active sports play. Wubble means BIG. Wubble means FUN. And Wubble Sports are BIG FUN!