I made these cute socks for my nieces. I was saving them for birthdays, but then the 4th came along and I had to do some red, white, and blue ones. I love them. They're really easy (basically, just a chain crochet stitch) and really fast (a few hours and you have some snazzy socks!)
These are the instructions I used, but there are so many out there! I just did a Google search and came up with lots of different styles. Oh - and it may just be me, but I used a lot more beads than the instructions said, so make sure you string extra!