My 3 year old daughter seems to have really taken the "aizehu oshir" mishna to heart:
After she colored on the table cloth. My wife sternly told her to clean it up. The methods she used weren't working, so they discussed putting into the washing machine when she says, "Mommy, you have to be happy with whatever you have. So even if I colored on the table cloth, you have to be happy."
The day before, while walking on the street, she found a rock she liked and picked it up. A minute later she looks on jealously at a girl on a scooter and says, "That girl has a scooter," but then puts on a huge smile and adds, "But I have a rock!"