No, I wouldn't hide from them the fact that they'll get taller. It's more...I think of the kinds of questions that the kids I've had a hand in raising would ask, and how they would go on to broadcast their information to their peers, and I think, "this is something to tackle in a couple of years, not right now."

Your feeling on the subject may differ, obviously, it's just...personal choice? I don't see anything wrong with not explaining, is all I was trying to get at. :)