Crates Wagon - BigJigs Rail BNIB £4.00 Out of stock. Handle with care! The detachable wooden crates are marked 'Fragile' and are ready for immediate delivery. Bigjigs Rail wooden wagons feature detachable loads that can be lifted by a Bigjigs magnetic crane. Magnetic couplings ensure compatibility with all other engines and carriages in the Bigjigs Rail range. Most other major wooden railway brands are compatible with Bigjigs Rail.