Bin of Lego accustomed else

Have the loader my brother (9) for Christmas because I was even a Lego Freak earlier. Since he is already experienced Lego, he could assemble it without any problems, the result was still kind of sobering. The operation of the bucket was very hackelig and the moving parts have ever loosened. So I thought, I have to because of my years of Lego experience, am 26, have a go yourself :-). With the same result ... Hackelig, shaky, barely controllable !!

Too bad, I very much Lego robotics home and not work as bad as this. I hope this is only because of the model.