Kool-aid will only dye protein fibers such as animal hair/wool or silk. You can dye cotton (like prefolds, etc) with fiber reactive dyes like procion or dylon, or any tie-dye set. However, BSWW are made from polyester and I don't really know what would work best with that or if anything readily available will dye it well. I hope you get some more input from those who have tried.<br><br>
ETA: You would need a different kind of dye for polyester, it seems to be difficult to get and not as easy as other dyes to work with. Here is some info on dyeing polyester- <a href="http://www.pburch.net/dyeing/dispersedye.shtml" target="_blank">http://www.pburch.net/dyeing/dispersedye.shtml</a>