What would a road trip with the kids be without playing the license plate game? For as long as I can remember, my sister, brother and I passed the time seeing how many different state plates we could spot on those long treks down I-95. The game always seemed to start off slow–how many times could we spot New York and New Jersey before getting out of the tri-state area?–but before long, it got a lot more interesting as we headed south. If you’ve tried unsuccessfully to engage your tech-savvy kid in this classic game, it’s time to kick things up a notch, smartphone-style. Introducing pl8s, a kid-friendly travel app for the iPhone, iPad and iPod Touch that gives a virtual shout-out to U.S. geography.