Foam Alphabet Letters and Numbers Interlocking Puzzle Play Mat &ndash; Non-Toxic 4.5 x 4.5 Inch Square Tiles &ndash; 72 Pieces ABC/123s Recommended age 5 yrs and up. Teach your child to recognize their alphabet and numbers Includes 72 pieces: 2 sets of 26 letters and 10 numbers in 5 colors that push out. POTENTIAL CHOKING HAZARD FOR SMALL CHILDREN AND BABIES Cushioned surface covering about 10 sq ft Each interlocking tile measures 4.5" x 4.5" THESE ARE NOT THE LARGE SIZE BLOCKS Build blocks and construct your own designs. Made of EVA foam (1/4" thickness)