Quinn helped tighten several of the screws we used to mount the engine and gearbox, and he helped find the pieces we needed. I found that he had some trouble staying focused and got very impatient. This is a very tedious and involved build that is going to take great attention to detail and lots of concentration. He seems to be more interested in playing with the pieces and jumping ahead to see the finished product than in the build process. I had to constantly refocus him to keep him involved and being helpful. Some of the pieces are extremely small and require very fine motor skills to handle and assemble. I am hoping that as we do this, it will pique his interest and help him to develop a keen sense of detail as well as developing his fine motor skills and hand strength.