Display a four-foot red cloth banner with the first 7 letters of the alphabet showing in WRONG order. Tell kids they are correct, and the kids say NO. Have kids call out the wrong letters as you point to them. Then you give the silk banner a strong shake and the letters appear in ABCDEFG correct order. Looks amazing!
This trick is especially good for library and reading shows. David often does his ABCs backwards stunt (from Bringing Home the Laughs) along with this trick.