Animal Rock, model 3900, is a sensory busy box designed for use by children with cognitive and severe physical disabilities. Pressing the frog activates a "ribbit" sound, press the dog and it "barks," and the cat "meows" when pressed. Three finger isolation buttons are located on the "rocks,"” which help promote manipulation and coordination skills. When pressed, the white button vibrates and makes soothing water sounds, the blue button makes owl sounds, and the black button activates a light and makes forest noises. The device can be used on a tabletop or mounted on a wall. Mounting hardware is included. POWER: Uses 6 double-A batteries. DIMENSIONS: 18 x 13 x 4 inches. WEIGHT: 2.75 pounds.