This kit offers 13 Purpllinkers. Each one-piece construction offers both mental and physical stimulation for children and developmentally delayed people of all ages. Mimic and Manipulate letters, numbers and geometric forms for reading and math readiness or phusical therapy. Use several Purpllinkers to spell names, create word games, there is no limit to the fun. Kits includes Teacher Ideas. No Batteries required, no parts to lose.