Deep down we all know we're learning important things for when we're older, but that doesn't make school any less boring. And since most teachers maintain a strict 'no toys' policy, kids have to find other clever ways to make it through a school day -- such as innocent-looking pair of erasers that are actually pullback race cars.
Both E-Racers actually erase, but you'll want to go easy on the mistakes because you'll be slowly wearing away these cars' disguises to the point where it will be obvious why you're really bringing them to class. And a two-pack is like $US9, so you don't want to have to be replacing them every week, or have to switch back to the boring erasers you were given on the first day. [NPW Gifts via Perpetual Kid]