dat called? . . . dat doo?

ben is already following in his daddy's steps as an engineer. i can't tell you how many times a day ben asks me, "dat called mommy? dat doo?" i never realized how hard it is to explain things to a little person who has no idea how some things work. like smoke. what does smoke do? or flowers, what do they do? clouds, grass? etc. etc. etc. it cracks me up. sometimes i admit i get really frustrated because i can't effectively communicate to ben what things do. and sometimes he finds my answers inadequate and so he continually demands, "a DO mommy?!" until either he grasps the concept or my answer is finally acceptable.