I've been addicted to making these pretty German paper stars (proper name : Froebelsterne) since I was very kindly shown by two very patient people. To be honest they were a little bit of a challenge to begin with (there are something like 40 folds to be made for each star) but so worth persevering with. I can proudly churn one out at whim now. There is a good Youtube tutorial here. I promise you if you try it you will be addicted too.
They would make lovely decorations for the Christmas tree, or hanging from a window on string. Jurianne Matter has lovely photographs and a tutorial. Her wreath is so simple and pretty.