The magnet crane at the construction site accidentally turns on, sucking up all the metal, including some of the Mecha Builders! The Mechas need to figure out how to stop the pull of the magnet before more of people's belongings get sucked up. / Roof is delivering eggs to Marwyn at the Treetop Woods Train Station. When he tries to stop, the brake lever snaps, leaving the train unable to stop. The Mechas need to save the train without dropping any of Marwyn's eggs!