For our son (soon 7 years), the deal already quite adept with fischertechnik and can think very well in three dimensions, a small dream came true when he made this kit in his hands. So he set out and was after about 5 hours with the largest model (a total of 3 models possible) completed without complications. Unlike some other kit by fischertechnik a lot of work for the statics is necessary, which requires a certain amount of endurance or ambition. Only when connecting the cables with the trolley (in particular in the drive crank) the father was asked what's also nice if the father is also included a little. But we managed it after two attempts, and so I can confirm proper functioning unlike other reviews. Now is this imposing crane in the middle of the nursery and a few daily loads "craned". But the plans for the next crane model (heavy-duty crane) are already studied by our son. A big compliment to fischertechnik for this great kit. Invaluable what children learn simply "do" here only.
