This may be a little too late to use with pumpkins, but you can file this away for next October/November, or it might bring to mind a similar creative idea to do with kids.
Erin from Silicon Valley YL sent me this idea and said this…
“We got a few hundred pumpkins the day after Halloween for super cheap. We had a huge “Pumpkin Bash”! …I would recommend something like this to anyone working with Middle Schoolers (as long as they have a good team of leaders!)”