Colo(u)rful stamps from the United States

These American stamps decorated the outside of a recent letter from my friend Holly. Aren’t they great? So colo(u)rful. One weird thing though…there are no numbers on these things, so how are you supposed to know how much postage you are actually putting on the letter? I must ask her about that. Oh, by the way, here’s a picture of Holly having her face licked off by her previous dog, Maggie.