Save yourself $8 and the unavoidable shame of being a grown man in a laser tag arcade with Hasbro’s new NERF Lazer Tag system. Pair your gun ($40 each, set of two for $70) with an iPhone or iPod Touch and you’re ready to play. Enjoy the slick HUD view, showing your gear and power level, and even the trajectory of your last blast. Like all good addictive games, there’s ample leveling up to be had, with new attacks and gear just waiting to be unlocked. Those 4th graders won’t know what hit ’em.