I do work for a fabulous charity and we make about 100-150 baby quilts per year to be donated to hospitals throughout our state. Our guidelines are this: must be 100% cotton and anything that is so thin that we can see through it, we give it to someone else to use for another purpose. Part of the dilema is that you have to think about how these quilts are going to be cared for and how they are going to be washed. You don't want to go through all that work to have them falling apart in the first year for example. These are the guidelines we follow and hopefully it will help you and your group.