Bear with me guys while I get these buttons out of my system. I wanted to rework them for an idea I have - tell you more about that some other time.
As well as being a piece of sewing equipment, in the north of England the word 'bobbins' is also used for something that's a bit rubbish. So you could say "that's bobbins, that is" about something you don't like. I hope you don't say it about my drawing though!! Ha!