Kindly re-read my post with your eyes open this time: "So do my THREE OLDEST grandchildren (OTHER TWO only four and two years old, respectively)."  Apparently your honor student children didn't inherit your reading comprehension skills.  Lucky for them.

My three oldest grandchildren are 16, 10 and 7--and the younger two were born and raised in Australia.  They know who Harriet Tubman is.  And John Brown.  And Ned Kelly.