Ron Lieber, writing for the New York Times:
Like most families, the Ryans occasionally find that some of their fresh food goes to waste. After a few incidents of rotting green apples, Ms. Ryan had her girls add up the cost at the store. When their haul amounted to $15.75, they were surprised that it was so high and they stood in the aisle trying to plot how many apples everyone actually ate.
“I could see the wheels turning,” Ms. Ryan said. “And that’s why lots of people don’t do it. It took a few minutes.” The girls decided that it was better to buy less and risk running out by the end of the week than to keep wasting food.
I love this idea.