My kids are in their late 20's to early 30's and I still have quilts that I made for them years and years ago. I made nice thick "floor quilts," using a thick polyester batting or two layers of regular batting. I used these in the bottom of the playpen or as a play quilt. I tied them every 4 inches or so, in both directions. They are still nice enough for grandkids to use. I mostly used baby yarn for the ties and double-knotted them.
I used a very light and thin batting for crib quilts and cuddle quilts. The polyester batting seems to have worn better over the years. The cotton battings are a little worn/lumpy after 10 years or so of laundering. The flannel interlining has held up well, also. I like using flannel in the middle between the top and a backing. Flannel as a backing gets pretty pilled after many washings. It is lovely for a while, but it turns rough (or at least mine did).
I still have around 8 quilts I made so many years ago. They aren't very fancy but they hold many special memories.
