Its almost like he's talking about someone else's kids that he's baby sitting.
Small children are a blank canvas. Good and bad. Mine is sitting down quietly paging through a book whilst I tap this in on the iPad. Moments ago, she was blundering about with a blanket over her head. A day ago, she was tired, and apparently determined to crack her head open by falling onto a metal bed frame.
It's life, the most precious thing in the world. Love it while you can.