Abstract: A bowling ball including a grip for a player's hand, with the grip including an elongated finger slot for receiving all four of the player's fingers. The bowling ball may be made of a resilient yielding material which aids the player gripping the ball. A method of making a bowling ball with a plurality of grips, with at least some of the grips including an elongated finger slot for receiving all four of a player's fingers, including making the ball of a resilient yielding material which aids the player gripping the ball.

Abstract: An inflatable training device having a flexible concave shaped dome for stepping on by a user and a base. A portion of the dome wraps around a portion of the base to form a bumper ring that is seated on the floor. The inner area of the dome is filled with air through either a high volume valve located in the base or a low-volume valve in the dome that permits the firmness of the device to be easily adjusted.