Put your cat in it and say, "For the crimes you have committed against the sleeping habits of your owners, you are hereby remanded to Lincoln Log Prison until 6 PM or until you get very hungry, whichever comes first."
Your cat will appear to accept her sentence with dignity, but the first chance she gets she'll shiv you in the belly three times and bust through the wall of lincoln logs, making a run for the space behind the toilet where she likes to hide. Luckily, your roommate will be able to take her down with his AK. This is dedicated to everyone on the inside. Come home soon.
Happy Build A Prison Made Out Of Lincoln Logs Day!