This was a good find sent to me by Myron Eby from New York. There are actually three mistakes on this sign, and another one which I blurred out to protect the sign-maker.
1. Change the "y" to "i" and then add the suffix, or if you aren't sure, just throw them both in for fun.
2. The suffix "ful" has only one "l".
3. The quilts do not possess anything, so the apostrophe is not supposed to be there. And . . . .
4. Why are only certain letters capitalized?