....when I chewed food with my mouth open as a child. I find myself on the verge of repeating the same words to dd. Must confess I have no idea if it's simply beyond a 5.5 year old to do this, or if she's more than capable but can't be bothered or somehow just hasn't got the hang of it.
What age would you expect it? Anyone got any good teaching techniques/tips other than endlessly repeating "lips together please"?