We'd need a list of items that you MUST get from your neighbors (you can't use your own stuff) and use to craft. Our theme could be to make your own animal or species of animal.
For example, if the list (of course, I'd assume it would be longer than this) was:
A soda (or pop...) bottle
A can (either a pop or a food can)
A cotton ball
You could make an animal called the Craftasaurous (oooh, creative I know...
) and the body would be the bottle, the head would be the can, the nose would be the cotton ball, the q-tips could be antennas, and the cheeto could be the tongue.
And it would be a lovely time meeting your neighbors! "Uh, hi... I live across the street. Can I have a cheeto please?"