Write-on Wipe-off Counting Mat

These double-sided mats are designed to be used with the Interlocking Cubes, but can of course be used with any common household objects as well.  On one side, place objects in the circle and then use a dry-erase marker (not included) to write the word for that number below it; or arrange objects in a stack and write the number below that.  On the other side, arrange objects into a stair from 1 to 10 and use the space above for introductory addition and subtraction exercises.  The mat is made of plastic and measures 30 cm x 23 cm (about 12" x 9").