Whilst driving in the car...
Imogen: Julius, Mummy asked you to take a nap and you are not taking a nap. That is a thumbs down choice.
Imogen: Julius, it's very important for you to make thumbs up choices. That's because then that makes you a big kid and proud of yourself.
Me: That's a great way of explaining thumbs up choices, Imogen.
Imogen: I know all about thumbs up choices. Julius, if you don't start making thumbs up choices I'm going to call you a very bad boy and yell at you.
Me: Um, do you think that would be a thumbs up choice, Imogen?
Imogen: Maybe it's a thumbs sideways choice.