Turn over the Sports Wheel & Ramp Timer and watch the liquid drips down the ramp on the one side. It takes approximately one minute (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 drips down. Sports wheel timer can also be used for teacher or child stress/relaxation, quiet time toy, refocusing prop, anxiety prop, or a timer. Sport Wheel & Ramp Liquid Timer is 5 3/4" Tall.