Help Greatly Appreciated - I need a voting option

I am helping with a local charity event in my area, its for helping family's pay for cancer bills.
The week will be dedicated to creating chainsaw sculptures and auctioning them off
50% of proceeds go to the charity (I get no money)

I need something that I can run on a page where people can come and choose which carvings they would vote for,
so that we can have a peoples choice etc, most of the carvers that come are doing it out of pocket and so peoples
choice gets money and I need a proper way to set this up? any ideas would be greatly appreciated.