Ironing and Trains, Can You See the Connection?

I guess I don't iron enough. Yes, that is a fact, I don't iron much. However, this morning I got the iron out to press the kitchen curtains that we'd just washed. Anyway, Alex came in and said, "what's that noise, what's that noise?" and I explained to him it was the steam coming out of the iron. Then it was "Mama's train, Mama's train, choo-choo". I did not make the connection at first either, but I think the steam coming out of the iron reminded him of the steam engine at the pumpkin patch. Kids say the cutest things!