ABC play dough mats for preschool and pre-k. I love these because kids can build the letters with playdough, find the letter in the alphabet line, find the letter/practice the sounds with the pictured objects, trace the letter, and write the letter.
Had when i worked in a preschool and kids love them! I would use colored sand instead of white salt. DIY salt tray with alphabet cards. Easy to make and kids have fun smoothing out the salt after correctly making the letter