Where's your seal?

When my son was little, probably around 3 to 4 years old, he seemed to have a unique gift.
He began telling us, "You have a seal around you." When asked what that meant, he described what sounded like an aura. Did he know something that we didn't?
He continued this for a year or more, not much longer than that. Sometimes we had the "seal" and sometimes we didn't. Sometimes he'd see a stranger, in a store or restaurant, and tell us that they had a seal around them.
And then it ended. He saw the seal no more...