My 7 yo DGD is doing a science project with her knitting. she needs to knit something from 100% wool to use for static electricity. Unfortunately, she didn't realize that yarn labels are IMPORTANT. Plus, I've given her some remains where I had given the label to the recipient of the item. so this is the problem: I have read tests you can do to determine whether the yarn is wool, or whatever. Unfortunately, I can't find that site now. It involved burning the end of the yarn, as I recall. does anybody know this site?