LEGO is not just a child’s game, as the Rolls-Royce Trent 1000 engine was recently debuted at the Farnborough International Airshow.

The model is only about half the size and weight of a real one, but nevertheless it’s still a very impressive structure. The project took about two months to create. The company used the actual blueprints of the real engine to make it as precise as possible.

According to GIZMODO it took 152,455 LEGO bricks, weighs about 677 pounds and is 6.56 feet long. This totally grand gray structure is apparently the only one in existence. The next step for this creative company is building a fully sized LEGO plane to place the engine in.