It's a challenge to look up at the stars and pick out the constellations. If you don't know what you're looking for, or where to start, it can seem impossible. But never fear, NASA is here. Using 35mm film canisters (which, I have a feeling, might be going out of style, so grab them while you can), you can make your own mini versions of popular constellations to practice with. If you want a little guided tour of the night sky, check out The Stars: A New Way To See Them by H.A. Rey of Curious George fame. It's a delightful book with clear explanations and delightful illustrations.