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
King School Library - Links to Multiple Free Typing Games (Keyboard Practice) - Check out out these typing tutorials and games to practice your own typing skills. Practice, practice, practice, and maybe someday you'll type as fast as I do.