This high quality Hurricane Tube is the answer to wanting a maintenance-free bubble tube. The unique design uses the same durable acrylic tube but with no water which means no maintenance! The inner tube funnels the specially coated styrofoam beads up through the tube simulating the calming effects of water. The LED light smoothly transitions through the colors maintaining focus and attention. Features an adjustable fan speed and a jack for a 1/4" Switch (ball switch included) which will stop and re-start the fan. At 48" high, this hurricane tube is the perfect size for any classroom, clinic or bedroom. The acrylic tube is 6" in diameter so it is sturdy to touch and feel the vibration from the fan. The base is made of durable wood and the white plastic cover, which means it's easy to clean. Adult supervision is recommended.