I have a little girl who is 3.8 and in the last week she has developed this VERY annoying habbit of disagreeing with everything I say.
Even when I say things like Nanna's got blonde hair hasn't she, it's "no she's not, she's got black mummy". It doesn't sound like much but it's EVERYTHING!! It's so frustrating and I don't know how to win this one. 
Any suggestions or experiences much appreciated. :)