Buddy is a human living in an elf’s world. He finds there are a lot of things he’s not so good at compared to the other elves. Before getting too sad, the other elves point out a lot of things that Buddy is good at compared to them. Even if someone is good at everything, they can still benefit from trading their services with others. Trade is often based on each person’s comparative advantage. For Buddy, that’s changing the batteries in the smoke detector.
Thanks to Mandy Mandzik for the clip recommendation. Check out her working paper, All I Want for Christmas is an A on My Econ Final: A Holiday-Themed Review Class, for more Christmas-themed economics examples.