DS (11 mo) will not go to sleep this evening. If I sit him up, he cries, so I've given up and let him lie on the bed while I also lie here to stop him falling off. I'm exhausted, as he's not a great sleeper. He has found a hairbrush on the bed, and is happily trying to eat it. if I take it off him, he'll cry. Should I just let him work away and enjoy the silence, or is a hairbrush really gross for him to eat?