[MitchellC]

My one daughter figured it out in fourth grade, and my other daughter figured it out just last year (end of fifth grade).

I'd bet they just kept up appearances for your sake, which I remember doing for a couple of years after figuring it out.

[21twelve]

Perhaps, but I don’t think so. Her twin sister figured it out a year earlier, but then had fun being in on it for one year. And as fun as Santa is - they all know the real “reason for the season”.