Sense-of-Timer provides a visual sense of time passing instead of an exact countdown time. They are ideal for self-governing activity periods, games, exercises, discussion groups, tests, time-outs and more. Each of the 6 Sense-Of-Timers is easily identified by their color-coded sand and clearly marked caps. High-impact plastic construction makes them extremely durable. Base diameter: 11,4cm. Height: 24,5cm.