Here's my latest, quick experiment. I didn't have any vinegar for food color dying, so I pulled out the kool aid packets. I figured they were already full of acid, so I could skip the vinegar. Into my baking dish I added 100% wool felt, silk, and wool/rayon blend felt. I then added concentrated Fruit Punch, Grape and Black Cherry. Pop in the microwave until the water is clear. Easy as snack time! I love how the different materials took the dye! Beautiful, but just think what it did to our insides as kids.