Before the airship collected the revolver-it was difficult, but much easier than the airship. It took 3,5 hours to assemble. The difficulty was that many small and fragile parts that needed to be, sometimes with an effort, put into each other and it was very difficult. The second time I would not collect. Stock up before assembling super glue, TC really several times I had to glue the parts that held out the pressure. It turned out in the end is easy, beautiful and airy. Not for children, very difficult.