Roll one of these inconspicuous looking cars over a special playing card and something awesome happens: It springs into the air and morphs into a robot warrior, Transformers-style. And while there’s also an entire card game associated with the 36 different Mecards, the on-the-fly transformation remains the selling point of these popular collectibles. They easily fold back into cars so kids can delight in making them spring to life over and over again.
