If you live in the United States and own any sort of airborne drone that weighs between 0.55 and 55 pounds, you must register it with the Federal Aviation Administration. Existing drone owners have until 19 February 2016 to register, but new drone owners must register them before flying them. Registration is free for the next month but will cost $5 after that. The registration lasts for 3 years, and is applicable to all of your drones, not just one. So if you received a drone as a Christmas present, be sure to register it, or you could face civil penalties of up to $27,500 and criminal penalties of up to 3 years in prison and $250,000 in fines. Ouch.