We do a lot of "Ahm nyam nyam nyam!!" noises when giving ds something to eat. It's a sort of family joke. It really amuses his big sister who does it for him too.
Recently I've noticed when ds sees something he wants to eat he huffs and grins and flaps like they do, but he also makes "nyam nyam nyam" noises.
I got some blueberries out of the fridge this morning and he was transfixed, furiously "nyam nyam nyam"ing and bobbing about until I gave him a handful.
Pure coincidence? Or is he 'talking'?