Here is an update picture of the blanket for my son. Its about 3 feet across. I made a big mistake last night and added another corner to it so for a short while it had 5 corners. So I guess I was aiming for a pentagon at that point! Oh well, yarn comes apart easily so I was able to get back to where I had added the extra corner and took it out.
I've got plans to make a blanket for my daughter and make heart squares like this and use lots of bright colors