There's a magical science to the Ooze Tube that fascinates all ages.You would be hard-pressed to find another decoration quite like this. The Ooze Tube is constructed of durable plastic.What makes the Ooze Tubes so unusual and one of a kind is just how captivating the dripping, bubbling, and oozing motion really is. Just try to take your eyes off of the Ooze Tube as its contents slowly slime their way from chamber to chamber. Ooze Tubes are an engaging product that can mesmerize anyone, adult or child.5 INCHES TALL WORKS LIKE A TIMER , BUT NO REGULAR TIME FRAME. BLACK LIGHT SENSITIVE.