Grab your kids' attention with these colorful alphabet mats. Interlocking pieces connect side by side or interlock in 3D format. They are made of a 1/3 inch, foamlike materials. Children spell words or use their imagination to create houses, toy boxes, castles, etc. A must for preschool and kindergarten classrooms. Comes in attractive plastic tote bag for easy storage. Fun to play with, soft and washable. Our kids line them up like a big train and then walk on them, reciting the letters.