Every child will love playing with the Bumper Ball! It can bounce, tumble, roll and spin! The Bumper Ball has 10 see-thru windows and 2 openings with handles. It is made of heavy gauge vinyl and can hold up to 150lbs. The Bumper Ball is 51" in diameter. Bumper Ball has 10 see-thru windows and 2 openings with handles. It is 51" in diameter and can hold up to 150lbs