Both my neices were TT by 18 months, Mackenzie is just starting but we have tried a few times. I found that she tells me when she is doing it, she pulls her nappy off when she had done a poo (even though I explain to her that if she tells me before we can sit on the toilet etc) or she runs to the toilet but of course by the time we get on it's all over! I'm using the towelling knickers this week and offering the toilet every hour or so and we have only had one successful trip so far- I know she's ready but she is too busy doing other stuff to go to the toilet. Why not give it a go and if it dosn't work try again later when more signs are there? I think the huggies site has some good 'ready to tt' signals on it too. Although you will get plenty of advice from the BB girls too!