I have discovered the most effective way to get the littlest brother out of bed.
It involves standing outside his room and singing the first verse of 'Do You Want To Build A Snowman', to which he predictably tells me to go away. Okay, bye.
Five minutes later, I go back and sing the second verse, complete with short conversation with poster of Craig Mackail-Smith (not the first time that that's happened). There are vague squirms of embarrassment from littlest brother's bed. He tells me to go away. I comply.
Ten minutes later, I go back and sing the third verse. Just as I've finished wrestling my voice into something that resembles the melody, the door flies open. Littlest brother is standing there, arms folded and still in his nightclothes.
'Okay,' he says. 'I'm awake. NOW STOP SINGING.'
Success.