A random conversation with my pre-schooler (who actually just finished Kindergarten under my homeschooling tutelage):
Dear Daughter: "Mommy, how many hearts do we have in our bodies?"
Me: "Just one, Honey."
Dear Daughter: (...looooooong pause) "...Well, I think I have TWO hearts in MY body, because I love you so much that ONE heart can't hold it all!"
And with that, the most challenging year yet of my dear daughter's life--the year that made the "terrible two's" look like a cakewalk--was all worth it.