Microwave popcorn is one of our new favorite snacks. It's easy, it's filling, it's really cheap, and the kids think it's a special treat. We first tried it on New Year's Eve when we had a movie night in the living room, with the sleeping bag.
Put 1/4 c. popcorn kernels in a paper bag. Fold the top of the bag down. Microwave on the popcorn setting, or for 2-2 1/2 minutes. listen carefully and turn the microwave off when the kernels slow down popping. Mine cooks for 2:15.
I don't add oil or anything, though I've heard it will help more kernels pop. I like that it's really low-cal and fat free. Also I can reuse the paper bags if I don't add oil.