Our colourful Large Sand Timers provides a fun and easy way to measure time. The Learning Can Be Fun Large Sand Timers help teach the concept of time as sand passes from one chamber to the next. Perfect for use In games and timing experiments. Sand Timers help sharpen concentration and ease stressful transitions both in class and at home. See at a glance how much time is remaining during a lesson, activity, or therapy session with no disruptive alarm. Virtually indestructible, including moulded end caps and thick plastic walls. Large Sand Timers measure 16cm high and 7cm wide.