sneaky, minuscule GPS trackers are impossible to come by, but with kids growing more and more mischievous, outraged parents are demanding more options. At least that's the word passed on by Lightning GPS' Jason Lazarus, who has just recently decided to make its ridiculously small Spark Nano available to the public. You see, this here company has generally thrived on providing covert GPS trackers to military and law enforcement, but now even civilians are being allowed in on the fun. The device, which is obviously used to track whatever or whomever you wish, is about the size of a 9-volt battery and can easily withstand bumps, bruises and the occasional drink spill. Users who implant one can track the subject via the web (shown after the break) or phone, and you can count on five solid days of continuous tracking when the rechargeable battery is topped off. It's shipping now from BrickHouse Security for $299.95.