I think that a donation is when YOU decide, what, when and how much to give. When you get a request for a donation, I certainly don't think you should feel required to give anything at all. You should look at your time and finances and if you can provide any assistance, it should be on your terms. I also think that most people have no clue how much time and expense goes into a quilt. I would tell the person who volunteered you for this fundraising activity that if they can get the materials donated, you'll donate your time (and anything else that you think you can afford), or maybe agree to one quilt, certainly not multiples. You sound like a very generous person, but I wouldn't feel required to give.