For young teenagers: Don't make the mistake of commenting how "really old" historical figures were when they accomplished the things for which they were famous...
My son is studying the War of 1812, and was summarizing biographical data on the major figures involved. As I was passing through the TV room with a mountain of laundry, he piped up, "Wow! Tecumseh was really old when he won that battle! He was born in 1768, you know."
I stood stock still for a moment, gently set down the Laundry Mountain From Hades, and then I quietly pointed out that I had, in fact, been born in 1968 and that since this is now 2012, I am precisely the age that Tecumseh was when he was "really old". The look of horror on his face was priceless! (I'm not sure how much the horror involves the "oops" factor and how much involves that somebody "old" like me could have been a major figure in the War of 1812... Kids!)
