Shop online for Imaginarium Alphabet & Numbers Foam Puzzle Mat 36-Piece at $21.99. It features 36 colorful 12” x 12” foam tiles, including 26 pop-out letters and 10 pop-out numbers. Features: 36 foam tiles include pop-out numbers and letters. Foam tiles interlock for flat or three-dimensional building fun. The safe surface is great for indoor and outdoor play. Easy portability and storage.