I use the dye kits that they sell at Easter to dye Easter Eggs. I stock up on the kits after Easter, when stores clearance them out. I usually get them for around $.20 a piece.
I can't wait to try the rit dyes. I also have spray dyes for paper that will work on fabric. They have shimmer in them also. Fun to try especially on small projects.
I am using kool aid and doing batik dying. I've tried that because I had kool aid left from dying mohair for teddy bear fur. And it worked. Just watch out if planning on using those as some of the colors are very intense.