The engine, which is one of the most complex Lego structures ever built, is a half size replica of the Rolls-Royce Trent 1000 which powers the Boeing 787 Dreamliner aircraft. The one of a kind Lego structure shows the complex inner workings of a jet engine and took four people eight weeks to complete. Including 152,455 Lego bricks, the engine weighs 307 kg and is over 2 meters long and 1.5 meters wide. Over 160 separate engine components were built and joined together in order to replicate a real jet engine.