I adore a website I found called File Folder Fun! There are a bunch of great file folder games you can make that are sorted by theme and grade level.
Here are a few of the games I have made...
This one was a bit of a pain to make since I had to tape each stocking to the folder in a way that would form a pocket.....oh and did I mention that it isn't much fun to cut out each of those little candy canes? My 4 year old likes this game but my 2 1/2 year old could care less about it after about the 3rd candy cane.
Hot & Cold science game