There is a kids cancer support group that needs 45,000 "Likes" on their Facebook page by Christmas Day, so that they can get a $25,000 donation.
You don't have to pay anything. You simply have to go to:
Once there, hit like on their page. That's it. The foundation supports kids with Cancer. They have the support of Ellen Degenres, etc. It's not a joke. It doesn't cost anything. It's doing something for a good cause on Christmas.