Mr W has been role playing with his toys since 9 mos, ie "racing" his cars around on the floor complete with sound effects.
He got a cave and jungle set at 1 year and liked to put the various figurines in poses on it from the very first day.
He really started role playing with his stuffed toys at 14 months complete with sound effects, ie wolf howling, cat meowing, etc. Lately he has tried to "feed" them and will sometimes talk to them and laugh at his own jokes.
I am not sure if that is what you are looking for.
