My daughter is 26 months and I am trying to potty train her. She was doing ok when half been doing it over last few weeks. But started properly yesterday and not one wee or poo yet in the potty! She's clever enough to do it but not sure shes physically ready. She can't jump yet and I have heard they need to be able to jump to have the right muscles to hold it in. Anyone else heard this or know whether it's true?