The author's purpose in "White Elephant Gifts" is to explain the fun and excitement of a White Elephant gift exchange during holiday celebrations. The author aims to inform readers about how the game is played and why it's a popular choice for parties.
One detail that supports this is when the author describes how guests bring wrapped gifts to keep their contents a mystery, adding excitement to the exchange. This shows that part of the fun is the surprise element, which is key to the game.
Another detail is the explanation of the rules, such as how players can choose to pick a new gift or steal an already opened gift from someone else. This helps readers understand the dynamics of the game and why it can create a lively and entertaining atmosphere at a party.