Turn over the Ooze Timer and watch the liquid ooze down. It takes four to six 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 ooze oozes down. Ooze timer can also be used for teacher or child stress/relaxation, quiet time toy, refocusing prop, anxiety prop, or a timer. Timer is 5" tall.