Give your kids a new twist on the trampoline with our NEW training bag! Hours of enjoyment and physical training for the budding extreme athlete in every family or for little ones trying out martial arts. Can be installed on any 12’ or 14’ JumpSport Classic or AlleyOOP Trampoline with the addition of our Octagon Trampoline Kit! Give your kids a new way to get physically fit & strong! Kick your trampoline into a new training arena! Includes Filling Needle (Hose adaptor), Training Bag, Foam Bag Liner, Weight Bladder Balls (4)’ Hanging Bolt Assembly (includes spacer and nylock nut), Triangle Carabiner & Anchor Strap with buckles Bladder balls are filled by the user