Four 13-year-olds recently went on a homecoming date, and only left their waiter a $3.28 tip. But then they wrote a two-page apology note a week later and admitted they just didn't know what they were doing. And they went back with a more appropriate 18% tip, plus a little extra to say thanks.
I love how these kids actually went back to make what was an unintentional mistake right. Way to set a good example for people in general!