What a nifty idea! if you want creative envelopes, go to Maps, map the route from your letter to the other person's mailbox. Print them up, fold them into 8 by 11 envelopes (or smaller if you are sending cards). This would be cool for pen pals
You can cure a paper cut with chopsticks, but we're not going to tell you how. (I wonder if it's because what you're supposed to do is stab yourself with the chopstick so that you no longer notice the pain from the paper cut.