On Luck

We're in the middle of some family vacationing and today my son Aidan (aged 9) bought a necklace with a turtle on it at a gift shop (Aidan loves reptiles). All afternoon Aidan kept insisting that his turtle was "good luck." And, wouldn't you know it, after Aidan bought his necklace good things started happening. We caught buses when we needed them. Waiting lines were shorter. And, at the end of the day, we saw the prettiest rainbow we've ever seen.

So walking back to the hotel Aidan and I have this conversation:

Aidan: "My turtle necklace worked, didn't it? It brought us good luck, right?"
Me: "Well, metaphysically no. But psychologically, yes."
Aidan: "What does that mean?"
Me: "It means it worked."