Turn over the Quad Drip Drop Liquid Timer and watch the liquids drip down into the lower portion. It takes four to five minutes (depending on room temperature) to completely empty into the lower portion. Great prop to keep on a science table for the children to tip, turn and watch as the liquid spirals down. Quad Drip Drop timer can also be used for teacher or child stress/relaxation, quiet time toy, refocusing prop, anxiety prop, or a timer. Quad Drip Drop Timer is 5".