I was at Hobby Lobby this week, and found some Red Heart sock yarn!
They only had one skein of each color, so there wasn't enough there to make a pair of socks. But I'm going to buy a couple skeins to try it out anyway. I guess I'll have to make different colored heels and toes.
I found it online too:
It was selling at Hobby Lobby for 5 dollars a skein.