Our grandson has just had his fourth birthday, and last weekend we were on babysitting duty.
Trying to persuade junior that it was time to go to bed, Grandma said
"The sun went to sleep over an hour ago, it's time for you to go as well"
Junior just looked her straight in the face and said in his most serious voice,
"Grandma, didn't anyone ever tell you that the sun doesn't go to sleep, it's dark because the sun has gone to Australia for the night".
That puts us oldies in our place!