Hello LEGO Technic car not so easy it's been up, especially the pistons of the engine .. even if it is well explained. Solid can really play with. Delivered without character or "driver" and difficult to find one that can take place ... and when you get there it takes up aps ... But it's the principle of "Technics" .. of On the other hand you have a child who wants to play with ... :-) This is a purchase that not regret. This toy is used and enjoyed (boy 11, who has other LEGO that are less "resistant" to stress that this model below)