DD was about 2.5 if i remember right... i tried the pull up pants to start with but she just thought it was a nappy and just wet them even rewards wouldnt work, Then i just put her in knickers one day and she went to the toilet everytime including Poo's and i thought i would try her over night without a nappy 2 days later and she didnt wet the bed so 3 days it took me to get her out of day and night nappies.... It took me awhile to work out not to use the pull ups, I was using them for about 2 mths before trying just knickers so if i had of put knickers on her instead of trying the pull ups she mite have trained earlier........

So my advice is DONT use pull-ups LOL
Good luck with it...

Sarah