Typical conversation with Lucas

Me: Where's your nose?
Lucas: (looks quizzical)
Me: Where's your nose?
Lucas: (points to dog)
Me: That's the dog. Where's your nose? (I touch his nose.) There's your nose. (pause) Where's your nose?
Lucas: (points to dog)
Me: Yes, the dog has a nose. Very good. But where's your nose?
Lucas: Mmm-mmm-mmm-mmm.
Me: You're hungry? OK. We'll find your nose later.
Lucas: Deh dah!
Me: Yes, that's the dog.
Lucas: Mmm-mmm-mmm-mmm-mmmmmmmm.