DS is 3.2 and very articulate for his age with a broad vocabulary, and always speaking in well-constructed sentences etc. However in the past couple of weeks he has started requesting things in a baby voice, e.g. 'Mummy, please can I have a snack? I'm hungry' has become 'Mama, hungry' said in a babyish sort of tone. Basically over the weekend it has got to the stage that pretty much 90% of the time when he is requesting something from us, it is in the babyish tone of voice, but normal chatter, conversations etc. are always in his usual articulate way.
There has been no big upheaval in recent weeks - life is pretty normal at the moment. He does have an 8mo DD but she's not yet at the talking stage - babbles but no words - so it's not like he is copying her.
I'm wondering what we should do to stop this becoming a problem (as opposed to it just being a bit tedious and annoying at the moment)
a) ignore him when he speaks like that, i.e. don't respond at all when speaking like that, act as if we haven't heard him, and only respond when he speaks properly
b) ignore the baby voice, i.e. respond to the request with whatever he needs whether in baby voice or not
c) do as we're doing - not ignore but ask him to ask us properly and then respond to the request when he does
Any experience or ideas?