The front of the truck was just challenging enough for the adults to put together with all the small parts that had to be attached yet easy enough for smaller fingers to put the trailer together. I certainly can't say anything bad about this truck, except that after you put it together you don't want to play with it, you only want to display it after all the time you have put into it. It is a great item for those wanting something to help them with their dexterity or help a young child with their fine motor skills. I would certainly recommend this product to anyone who was thinking of purchasing it