Hanni (4) has such a scientist's mind. Last night we were talking about how at her swim class we saw scuba tanks discharging, and she said, maybe the noise was from air going in, not out. I said, no, that couldn't be it, because we put our fingers up to the valve and felt the air coming out. (I didn't feel like getting into an explanation of compressed air.)
I felt bad for being the know-it-all grownup and squashing her thought process, but I needn't have worried. This morning when I thought she was still asleep, I heard her voice from the bedroom: "Mama, I just thought of another idea about why they were emptying the tanks. Maybe it was to get old bad air out and put in new fresh air."
It trips me out that she was still thinking about it the next morning.