It's pretty easy to do...from large or small pieces of fabrics. I start by laying out my 15 piles and go around placing one fabric on each. If I have 6 charms then they're only placed on six piles. When I cut my next charms, I start placing them on the piles where I left off and keep going around and around till I have 50 different charms on each pile.
Signing up for 15 sets of Cotton Candy!