There was a great tute on here for a cupcake pincushion that used the plastic cupcake holders and a 3" styro ball. I made a bunch for our quilt group for Christmas but apparently I don't have the picture on this computer. :( sorry. They turned out so cute. I carried them on a cupcake tray from the bakery and everyone thought they were really cupcakes.
Sandy
here you go:
http://www.quiltingboard.com/t-56928-1.htm