The total assembly time is around 4 hours, the age category, I think, is not 6 years old, but at the level of a Lego technician, but the assembled structure is just super, there are swivel mechanisms for the front and rear wheels at the same time (maneuverable), raising the boom, extending the boom, raising and lowering the crane , extension-retraction of supports all at the same time. As an adult, I really liked it, and the child is completely delighted. I highly recommend, also lego but without overpaying for the brand. He also has full compatibility with the original Lego.
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