One side of this magnetic board features a 10" x 10" grid printed with number 1 to 100. Flip it over and you have an empty grid ready to fill up with your foam magnetic numbers. This great tool supports number sense, counting, skip counting, place value, addition, subtraction, multiplication facts and more. Features a write-on/wipe-off surface so you can use the blank grid with dry-erase markers for graphing and making charts. Intended for ages 5 years and up.