Elapsed-Time Dice from Koplow Games are simple, skill-building learning aids that help teach a difficult concept. In a fun way, they help kids in grades 2 and up understand how much time has passed, or will pass, between two different events. Elapsed-time dice are among the 1,200 different standard and polyhedral dice offered by Koplow Games. The company’s extensive educational line includes a variety of different math dice plus math manipulative dice verbalized in several different languages. Elapsed Time Dice come in three sets: four jumbo (29mm) 12-sided dice including a yellow pair for a.m. and a white pair for p.m.; and a set of jumbo yellow a.m. dice only, and a set of p.m. dice only.