I love the idea of buttons...just don't know about actually using them if you intend to use this as a blanket..not a wall hanging. If you have dogs that like to chew anything.. buttons could be a problem. Love the idea though, it would really look great...what about appliqued circles?
I really like your border choice. You tore all these strips? I'm scared to do that! Its looking great though..can't wait to see your progress!