DD is 26 months and over last couple of weeks has been increasingly interested in potty. She frequently asks to do a wee wee on the potty. Fine, que strip off lower half. She will then happily sit on the potty for up to an hour, reading books, colouring, scoots over to activity table etc etc. She will normally eventually have a wee (luck more than judgement i think) and is very pleased with herself. But if we have to go out or something before hand and put nappy back on we have a massive meltdown.
I think she knows she needs to go but doesn't know how to start. Any advise