My grandson and I are walking round the garden at dusk after his third birthday party, searching for lost toys with a torch.
Suddenly he says, “What’s that little dot?”
“Which dot? Where?” I ask.
“That little shiny dot up there”, he answers, pointing to the sky.
“That’s a star,” I tell him, “it’s a long, long way away”.
“I will have to go on my bike then,” he says thoughtfully.