Going Swing changes color with a squeeze of the hand. Move through seven constant colors: blue, green, red, purple, cyan, yellow, white to slow, then fast pulsing. Shock resistant polycarbonate core with removable, ribbed, thermoplastic rubber cover that provides slip resistant tactile stimulation. Includes a detachable lanyard for dazzling light shows. Measures 2″ diameter and requires 3 AG10 batteries, included. Phthalate and latex-free.