We haven't seen too many notable R/C cars since Takara Tomy's wall-climbing AeroSpider RC turned our world upside down way back in late 2008, but it looks like Mattel thinks it might just have the next big thing with its new foldable Stealth Rides cars. Like a Transformer that turn into a box, these promise to spring into life at the push of a button, and should give you about 30 hours of playtime on a single charge. Naturally, Mattel also seems to have a number of licensing deals lined up, with a Batmobile Tumbler being one of the five models that will debut at next month's Toy Fair in New York. You'll have to wait until August to actually get your hands on them, however, when they'll run you $25 apiece.