Description Hornby R9345 Playtrains Builder Signal Box Product Info Explore a new Playtrains world with the Builder accessories. Expand layouts and add scenic details, which complement the Playtrains Rolling Stock and Train Packs.   The Builder Signal Box is a great addition to every layout, working together with the Playtrains range to build exciting adventures. The easy plug together structures offer a great way to practice construction skills, preparing young railway fans for more complex layouts.   The Builder Signal Box features a two-story structure with an exterior stairway and bright colours to match the Playtrains range. OO Gauge