Nice this thread was ressurected for a new summer season of DLR travelers. Glad I could help.

I've done a scavenger hunt the past two years but won't be doing it this year since DH and I are going alone this summer. I'd know where everthing was and that would be no fun. Hmm... maybe I could pick out something at random and see how many I could find. Like birds or mice or something.
One year I went around taking pictures of restroom signs and another year I made DH stand in front of the trash cans from different lands.

Oh, I know, on the DLR podcast Wayne mentioned the popcorn machines all have a different character inside. I could look for those.