"This LEGO airport city set was a breeze to assemble for my kids. All of the bags are marked with numbers that correspond to the order in the instructions. There is no guessing or confusing the pieces on where they go. My kids love playing with the airport set, with one acting as a pilot and the other as the ground crew/mechanic. They have combined it with their train set to complete a true mini city. This is a must for any kid that likes airplanes as much as my kids do."