There's a lot of pseudo-patois in chat these days, mainly down to awful broadcasting, so it'll just work with some kids but not all thank goodness!
A few years ago, some kids decided that they could speak with a rise in their final syllable, like a 'cod' Australian accent - which I know well, and like as my old flatmates were all from Sydney, and it has become a standard irritant here too! You'd hope the BBC wouldn't do it, but of course, they need the kids don't they!
A delightful description was relayed to me once, calling this the 'Moronic interrogative', which seems to sum it all up!