Learning Resources Sand Timer Bundle. Watch time pass with these colourful Jumbo Sand Timers, designed for use anywhere children need help managing time. The colourful, squared-off, soft rubber end caps provide increased durability, and allow for quiet pausing of the timer. Includes 1-Minute, 2-Minute, 5-Minute and 10-Minute timers. (Note: Jumbo Sand Timers are not precision timing devices.) Timer measures 18cm H. Ages 3+.