I deciced to just overlap the circles and sew them. It does not make for a great bed quilt but could be used for going to the park.
I tried to two ways of arraigning the circles . The first was to make an apple core look. This got confusing after a while but showed it would work. Any later circles I add will have to be on the side. Then I started putting all the darker pieces on the bottom and light on top. I like that better.
I may try this technique with felted wool. Both wool and denim can be left with edges unfinished.