Clever Johnny's primary school class went on a school trip to the local fire station as part of a community fire safety initiative.
To encourage take up of smoke detectors, the firefighter giving the presentation held up a detector and asked: ‘I hope all of you have one of these in your house – they are very important. Does anyone know what it is?’
Clever Johnny's hand immediately shot up and the firefighter pointed at him.
Clever Johnny replied: ‘Daddy says that that's how Mummy knows supper is ready!’