I loved doing this when I was learning how to read and write! Have the child say the individual letters as they trace them in the salt/cornmeal, and you're addressing all three learning styles: visual, auditory, and kinesthetic.
Pre Kindergarten Morning Work for Entire year 180 days
This is the answer to my prayers! I love teaching Pre Kindergarten and have always wanted to compile something that would cover, month, day, letter of the week, number of the week, color of the week and shape of the week. Not to mention patterns and numeral recognition and one to one correspondence.