What's the most memorable thing your kids have done for you?

Everyday, my first born asks me "Are you okay, Mama?, Are you happy?" It makes me feel that he's so much concerned about my feelings and is always thinking of ways to make me happy. He started doing this when he was 2 years old. And he would of course say "I love you, Mama." almost every hour of the day since we're together almost 24/7. :)