hmmmm... interesting idea! thinking about how to attach the cover to the seat... maybe use velcro or elastic. in either case, it would have to fit tightly. thus, your seams in the quilt blocks should be sewn well so they don't come apart. also, the seat gets lots of wear 'n tear from sliding in and out of the seat. i think regular quilter's cotton would wear out quickly. i'd love to see a successful outcome to your project... then i'd think about doing that as well, just to have another place to show that i'm a quilter