Here's another angle to approach to using 10-count tray. Teamed up with counters and these 10 frame configuration dice, teaching games can be developed. The dice are in four colours and three common configurations (3 x 0-5, 3 x 5 - 10, 3 x 10-15 and 3 x 15-20). The dice have framed spots to encourage counting and to indicate where markers can be placed. Set includes a storage jar and an activity guide to get the class started. Dice measure 50mm.