My 3yo "I want..."'s all day. I hate it. She says it with the complete expectation that whatever she wants she will get. A huge tantrum will follow if I dare say NO! (Which is relatively often!!) How do I teach her that all of her want's are not going to be met? How do I teach a 3yo the respect and manners (she does say please and thankyou) to ask in a respectful tone. She just said to me:

"I want an iceblock mummy!"
naturally the answer was no, it's 9am! You can hace an apple.
No I want an iceblock. (in a horrible tone of voice!) Im really really hungry!
No Lily, if you're that hungry you can have an apple or madarine.
TANTRUM!!!

How do I teach her tone and intonation and about back chat? It's one thing I really dislike in children- 'I want'ing all the time. I'm trying to teach her "Excuse me mummy may I have...." though it's a bit of a mouthful for her at the moment, lol! I know it's probably an age thing, but I would like to get her out of the habbit before it sticks!!