My mom never forgets to remind me (often at inopportune moments) what I did to her:
When I was in kindergarten (about a million years ago), my teacher asked us to draw a snow scene for homework. Well, after I went home that evening, while my mom was taking a nap, I got VERY creative and made a bee-u-tee-full snow scene with strangely oblong snowmen and a veritable blizzard of snow.
The next day, when the teacher sent it home with a note praising my creativity, my mother wanted to die.
I had a created a snow scene and colored it in great detail - by sticking about two dozen maxi pads to a piece of construction paper.
Nice, huh?
My mom kept it.