Abstract: A volleyball training kit having a first volleyball, a second volleyball, and a third volleyball, each of the volleyballs being approximately the same diameter but having increasing weights. The kit also includes instructions describing a progression of use for the first volleyball, second volleyball, and third volleyball. In some embodiments, either the first volleyball has a weight of approximately 160 grams, the second volleyball has a weight of approximately 200 grams, and the third volleyball has a weight of approximately 240 grams, or the first volleyball has a weight of approximately 170 grams, the second volleyball has a weight of approximately 210 grams, and the third volleyball has a weight of approximately 250 grams. Also provided are single training volleyballs having different uses.

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.

Abstract: A basketball quick change hoop assembly is shown and described. A board mounting adaptor plate having flanges on its vertical edges engages vertical channel sides of a hoop mounting member. Slots at the top of the flanges receive extensions from the hoop mounting member.

Abstract: An inflatable rubber football is provided with softened ends by leaving the ends of the bladder free of the usual reinforcement wrappings.

Abstract: The proper inflation of playground balls is controlled by fixing a strap to a predetermined circumference equal to the circumference of the ball at proper inflation. The strap is then placed around the center of the ball and the ball inflated until the strap is tight. The strap is then removed and the ball is properly inflated. The strap may be secured at any of a plurality of settings equal to the circumference at proper inflation of any of a plurality of different balls. The strap is marked with numbers equal to the diameter at proper inflation of the ball to be inflated. The desired circumference of the strap is preferably maintained with a hook-and-pile type fastener.