Wopila, also known as "The Giveaway", is how the Lakota Sioux celebrate special occasions. When someone gets married or has a birthday, for example, that person gives away presents to their family and friends. And they often don't give out dollar-store generic items; many will spend weeks or months making the gifts, like art and quilts, or collecting items their loved ones may enjoy, like recipes or little gadgets.
Think about it: it's completely backwards from typical American culture! Can you imagine spending so much time and energy creating gifts for others in preparation for your birthday? Or adding "get gifts for everyone I love" to your list of wedding to-dos? It's crazy!
But it's also awesome, as far as I've read. People who observe Wopila these days seem to really enjoy showering their friends with gifts, and, as a result, think about "stuff" differently. They have developed a habit of focusing on what they can give instead of what they can get (even though they probably also get a lot from other Wopila-ers!).
It's an act worth considering. I have been, at least. :)