Hours of tactile and auditory stimulation! This innovative Bead Chain is great for developing the concept of cause and effect. Movement of the beads will turn on a built-in music box. As long as the beads are making contact with the metal bar, the music stays on. Can also be used as an external capability switch without music when connected to any toy or device. (Works as a switch or as an independent toy). Size: 13"H x 15"L x 11"W. Requires 2 AA Batteries