It's also called Faux Cathedral Window. I've made 2 using denim for the circles and just left the edges raw so it frays. The centers of the first one are hubby's old work shirts and the second one is for a baby so I used left over flannel scraps.
Yes, they are very easy to do. If you cut all your circles the same size and mark the center square the same on each one, they are super easy.