One or two puzzles I’m thinking.
The Scare Crow one from Wally’s book sounds like it might fit. To find a portal to the pumpkin lair. This one might take a bit of time particularly if people need to run outside to fetch some scarecrows.
I have another one which is a bit more logic puzzle/spatial puzzle. It involves floor tiles and alcoves. I still need to craft a story around it, but the core is simple.