Let your children learn numbers and letters through play with this Puzzle Foam Floor Alphabet & Number Puzzle Mat.  It features 36 colorful 6" x 6" foam tiles, including 26 pop-out letters and 10 pop-out numbers. The versatile tiles interlock, allowing flat or three-dimensional building fun, and the 0.25" thick foam provides a safe and soft play surface for both indoor and outdoor fun. The foam tile pop out numbers and letter safe surface (for indoor and outdoor use) covers 36 square feet.