For that feral cat you've adopted, when it's cold outside, get a cheap styrofoam cooler and tape the lid on really well. Cut a hole in the side for entrance/exit. The cat's own body heat will keep it warm inside the styrofoam cooler.
Why it's important: Because "a surprise kept is no fun at all," said only this kitten, ever. Honestly, this kitten wouldn't get away with any of it if she weren't so dang cute and that's a skill in itself.