Abstract: A platform having a plurality of specialized openings shaped to accept specialized pegs to act as immobilizers for objects to be placed on the platform. The pegs have a shaft and at least one pair of nubs protruding from the shaft of each peg. The openings are shaped to allow the first end of the shaft to pass therethrough but not the nubs unless the peg is positioned so that the nubs are aligned with a notched portion of the opening, and the head at the second end stops further movement of the peg through the opening. When the nubs do not pass through the opening, the nubs act as a pivot axis where a portion of the peg remains above the platform. Pegs so adjustably positioned in the openings can be arranged to surround and immobilize an object on the platform.

Abstract: A ball thrower having a resilient ball holder attached to a flexible line, which may be used to play with a pet dog. After the ball is loaded into frictional engagement with the resilient receiving end of the holder, the user can grip the opposite end of the flexible line before undertaking a forward throwing motion like a pitcher. The user first moves the thrower backward in a cocking phase, and then whipping forward in an acceleration phase until the ball has enough angular momentum to overcome the frictional engagement of the resilient receiving end of the holder such that the ball is thrown forward from the holder while the user holds onto the end of the line in a release phase.

Abstract: A platform having a plurality of specialized openings shaped to accept specialized pegs to act as immobilizers for objects to be placed on the platform. The pegs have a shaft and at least one pair of nubs protruding from the shaft of each peg. The openings are shaped to allow the first end of the shaft to pass therethrough but not the nubs unless the peg is positioned so that the nubs are aligned with a notched portion of the opening, and the head at the second end stops further movement of the peg through the opening. When the nubs do not pass through the opening, the nubs act as a pivot axis where a portion of the peg remains above the platform. Pegs so adjustably positioned in the openings can be arranged to surround and immobilize an object on the platform.