Circulating Christmas card

It takes a lot of water and wood to produce one sheet of paper. Often, we use less than 5 minutes of the paper we produce. A circular card, on the other hand, can be used for many years. It’s especially cool when the card comes back to you in a circle. The idea is that you make a double-sided card. You write your Christmas wishes on an extra sheet and send it to a friend. The following year, your friend swaps out the extra sheet and sends the whole card back to you, or sends it on to your friend! And that’s how the card circulates, and how many buckets of water and wood are saved!