Original Teeball is a game to hit the ball that is standing on batting tee. So that it is too easy to play for not only adults but also junior boys like as middle school and high school students. So we invented the equipment for players to hit ball rolled down from pipe. We call it “Rolling Teeball”. It is different on batting tee and balls. We use “Rolling Tee” and 9inch balls (instead of 10.5inch balls)