Turn over the Color Drop Timer and watch the two different colors drip down. It takes approximately one to two 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. Color Drop timer can also be used for teacher or child stress/relaxation, quiet time toy, refocusing prop, anxiety prop, or a timer. Timer is approximately 4" wide and 7" tall.