There are tons of simple carnival games you could do that would let you do fast turn-arounds to meet lots of people. You can do candy or a treat like cookies for prizes (Since you probably can't give anything bigger than a certain amount out, I know our limit was always a quarter).
You could easily make a fishing game with magnetic plastic fish with your letters or a bean bag toss into a cute board decorated with your letters and/or pictures.
Threaded Mode
