One use I have for them goes as follows:
Center a large patterned piece of fabric on a batting and backing. Quilt that portion. I used a fishy print for my first one, which I did as a demo at our fair. I had cut the corners off a 22x 36" piece. Then I worked around it, log cabin fashion, with the noodles. At each 'corner', cut off the extra. Keep on going until you have the batting mainly covered. Sew in the corners you had cut off. Add a border and bind. Mine took 2 1/2 hours for a nice baby quilt (up to the binding). I was also doing basic quilting lessons and answering questions at the same time. Don't try this without some kind of foundation.
The picture is a later one I made without a foundation, not as good as the original.