My 10 year old explained the heart to her class using our overhead tank. She learnt it from the plumber
Her teacher stopped me at pickup to say my daughter had given the best explanation of the heart in the class: the tank on the roof, the motor that pushes the water up, the pipes going to every room, and a valve 'so it doesn't all come back down'. The teacher assumed I'd coached her, since I'm a cardiologist. I hadn't. Last month our motor broke and she spent an hour following the plumber around asking questions. Twenty years of training, and the plumber got there first.