The Crawl-Through Bead Chain with Music, model 206, is a sensory integration activity designed for use with children with mobility, visual, neurological, and cognitive disabilities. This bead-chain curtain is suspended from a free-standing frame that enables children to crawl through. As the child crawls through, moving the bead chains activates a built-in music box, providing auditory reinforcement of movement. POWER: Uses 2 AA batteries. DIMENSIONS: 26 x 26 x 27.5 inches. WEIGHT: 9.5 pounds.