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
"The most powerful tool in coaching is the question - the Greek philosopher Socrates is regarded by some to have been the first coach. Among other things, he used deversified questions in his talks with his students. Here is how he did it.
Also have a tub of objects on table and do not have pictures of A objects below so they find the right items Alphabet play dough mats. Easy for beginning kindergarten because the letters on mat look like real play dough "snakes".