Exercise ball Exercise ball An exercise ball, also known as a Swiss Ball, is a ball constructed of soft elastic with a diameter of approximately 35 to 85 centimeters (14 to 34 inches) and filled with air. The air pressure is changed by removing a valve stem and either filling with air or letting the ball deflate. It is most often used in physical therapy, athletic training and exercise. It can also be used for weight training. The ball, while often referred to as a Swiss ball, is also known by a number of different names, including balance ball, birth ball, body
Magic 8-Ball the revamped product caught the attention of Chicago's Brunswick Billiards. In 1950 they commissioned Alabe Crafts to make a version in the form of a traditional black-and-white 8-ball. The Magic 8-Ball is a hollow plastic sphere resembling an oversized, black-and-white 8-ball. Inside, a cylindrical reservoir contains a white, plastic icosahedron floating in alcohol dyed dark blue. Each of the die's 20 faces has an affirmative, negative, or non-committal statement printed in raised letters. These messages are read through a window on the ball's bottom. To use the ball, it must be held with the window initially facing down. After "asking