Your children will quickly master division with this durable, write-on/wipe-off learning mat! It's great for at-home, for a fun meal-time activity, or taking it on-the-go to use in the car or while eating out. Use with dry-erase crayons (sold separately). Do not use regular crayons or markers. Use a paper towel or cloth to clean dry-erase crayon marks. Mat can be fully cleaned with disinfecting wipes, or with soap, warm water, and a non-abrasive sponge. Dry completely before reuse. One double-sided mat. Ages 8 and up