My DD is 9mo, with 2.5 teeth. I've been trying to brush her teeth since the first one came through with not much success. She just chews and bites the brush using the gums at the back of her mouth where there are no teeth yet - same thing happens if I use a Brushbaby brush. I often resort to just rubbing a tiny amount of toothpaste on her teeth when she's asleep when we've got nowhere with brushing them while she's awake. Any tips?