To set the scene we have watched Mr Stink today...twice. We've also read a book which has a princess with a lady's maid in it. What follows is the sort of conversation we have in our house.
Me: No he wrote the book and is an actor. The Prime Minister is a man called David Cameron.
Tilly: He's called David though.
Me: Yes but it's not obligatory.
Tilly What's obligatory mean?
Me: Has to be. The Prime Minister doesn't have to be called David.
Tilly: What does a Prime Minister do?
Me: He's pretty much in charge of the country.
Tilly: I thought that was the Queen?
Me: Not really. She doesn't have much power these days.
Tilly: So what's good about being the Queen then?
Me: She's very rich and can have what she wants for dinner.
Tilly: I know what's bad about being the Queen.
Me: What's that?
Tilly: Not being able to stop someone from pulling your trousers up for you even if you can do it yourself.
Phoebe: But I need help pulling trousers up. I can't do anything. Pants or trousers.