It is flannel. I don't like flannel and won't do that again. I finished it with simple hand-quilting 1/4 within each puzzle piece. The backing is the same as the border and binding. I altered the pattern to make it small and used fat quarters.
Twins in our church. This is the boy quilt and my friend is make the same pattern in girl fabric for the other twin.
This is an easy pattern found at:
http://www.equiltpatterns.com/quiltp...21a8b3d5ba3a4a