Inside the box there is also an instruction manual and a safety advice document. Everything in the manual is translated into several (many) languages. It contains general assembly instructions and warnings, information about the required paint colors and 41 very detailed drawings that will guide you through the steps of assembling the Big Boy locomotive. One thing that I was not happy about is that on the outside of the box only 5 colors are listed as required paints (8, 9, 91, 99, 330), but the instruction manual lets you know that you will also need colors 75, 86 and 92.
Otherwise the contents of the box is more than satisfactory. It contains everything a modeler would expect, except the accessories, of course: paint, brushes and glue.