It depends on how much work you want to do? If the circles are about 3 inches? you could use them in the inside piece of Drunkard's Path. You could cut out and applique the circles onto a background square and then cut in quarters and reassemble. The circles would look great appliqued in the middle of Dresden Plate blocks. How about just using a pattern you've been wanting to try to experiment with? I think a 3-D pinwheel may look cute with the circles fussy cut out. Warm wishes would look nice with the big blocks in the circle fabric and picking a couple of colours from the fabric for the sashing. The possiblilities are endless. Have Fun!