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.
Sight Word Activity Books! Students learn sight words in context of a short story, which includes a predictable phrase (emergent reader). Four other fun activities are included for students to practice sight word recognition, writing sight words, and fine motor skills. Get all 40 books for only 50 cents each!