For a fayre of some description, a few of the favourite stalls we have had are:
Teddy Tombola (families donate unwanted soft toys, which volunteers take home and wash, to spruce them up a bit). You can package them up with ribbons and stuff if you want them to look extra special. Then you run a tombola stand as normal, and the kids LOVE it. We did one in the spring, and there were loads of soft toys donated (people love the chance to clear out), but none of them were left at the end of the night.
Guess the Malt - if someone is prepared to donate a nice single malt whisky, you put it in a nondescript box, and come up with a list of malts for people to choose from. I think we charged £1 a go.
Guess the serial number of the £20 note (as above)
We also do a calendar - we ask local businesses to sponsor a month for a fee which covers the printing costs - that way any sales are pure profit.
Beetle drives can work well too.