Sitting on a wall on the way home from school, practising maths.

‘...and how old will you be in ten years’ time?’

‘Sixteen!’

‘That’s right, very good.’

‘And Daddy how old will you be then?’

‘Well what’s fifty plus ten?’

‘Sixty!’

‘Yes, well done.’

‘Daddy, how old will you be when I’m 105?’

‘Oh I don’t know, very, very old.’

When you’re 105 I’ll be 148. Yes. I’ll be 148.