Papercraft Star is a site that offers weekly challenges and a monthly Grand Prize. They are going to be giving away a $25.00 gift certificate once they reach 1000 followers. As I type this they have 893 followers! They have 3 ways for you to enter for up to 3 chances to win the $25. The gift certificate is to either Papertrey Ink or My Favorite Things! Check out their page for more information.