Those types of quilts are why we have UFOs!!!!! Don't feel bad. When my elder daughter was 5 years old, I started a Winding Ways quilt. I was new to quilting then. I let her pick out the colors (shades of purple - she was BIG into Barney then...). So there were about 400 curved seams to do, then I wanted to make it POUFY so I bought extra high loft poly batting and THEN I decided to hand quilt it - and ECHO it in the bargain!!!
It was a UFO for years (my daughter is 22!!!) until I pulled it out this year, finished it off on the machine and threw it in my truck. I figure I can use it for football games while my younger kid cheerleads. There is a picture of it in the UFO Challenge thread. It was the only way I got it done!!!!!