Henkei! Henkei! Transformers

A cube-shaped object heads towards Earth from space, heralding things which are to come... As three students head to school, they gossip about the latest mystery, cars being driven without drivers, as reported to the local TV news station by a schoolmate from a different class. One of the kids is Wataru Hoshinoumi, a 5th grader at the town's elementary school who aspires to become famous. (Source: Transformers Wiki)