Fun! I wouldn't know how to attach or use most of those. I did pick up a Griest(spelling?) buttonholer today to fit our low shank Singers. It's complete other than the feed dog cover plate. Fortunately one of the ones that came with my White buttonholers will work though the fit isn't perfect. Playing with the attachments is fun. My daughter got a kick out of using the buttonholer.
Now we just need a project that uses buttons.
Rodney