I've done various things with the end bits of all the balls of yarn I've used, including making a couple of very colourful scarves. The other day I had a message from Grandmother Carolyn on Zibbet telling me about (and showing me) a fab afghan that her grandmother had made from the odds and ends of yarn. It was very beautiful.
So, erm.... here is the start of my much messier version!
I quite like it though :-)