How about doing a 3D pinwheel? The fabric would be good for it and with the knit maybe a few applique animals on the back of the quilt or if you put sashing in between the blocks the way I did you could use the knit for applique in the sashings. My grand daughter loves her 3D pinwheel. I used white as the background to put the pinwheels on. There is a great tutorial on here from a few years ago that was so easy for me to follow. Good luck.