Click n' Play puzzle mats are known for their quality, safety and durability worldwide and are therefore used in many schools and pre-schools because they last Click n' Play puzzle mat Letters and Numbers is Click n' Play's premiere tile mat and includes both uppercase letters plus numbers. These thick mats are easy to hand wash with soap and water and are submersible if you want wash them in the sink. When assembled into a square, the Click n' Play puzzle mat Letters and Numbers are a huge 72 inch X 72 mat, though you can assemble the 36 12 inch Square tiles in any configuration you wish to suit your needs. Each tile, letter and number are textured on top and have a skid resistant bottom. Click n' Play puzzle mat can be mixed and matched to grow with your needs or for more assortment.