Designed to produce simultaneous tactile, auditory and visual effects, the Sensory Table can be placed on top of the Educational Light Cube to add visual interest. Place water, sand or other sensory materials inside the tray. Turn the tray device on and watch the materials shake, sift and glide about! The tray is water-safe and easy to clean. Tray comes with rechargeable batteries and an A/C adapter. Includes: 1 sensory tray up to 21.5 x 8" and guide.