The main building goes together with 4 pieces, then the fun begins. Instructions say to separate and clean up the detail parts, then stick them on sticky tape for painting. If you do that, number them in order on the tape. I elected to paint them on the trees. The instructions show pictures of the trees with parts numbered. Then I separated and cleaned (and touched up) the parts as I installed them. Plan how carefully how YOU are going to keep track of the part numbers. There are a lot of tiny details. Makes a wonderful project and a nice looking, interesting building. The pegs on the detail parts don't always fit right off the tree. Test fit EVERY part before getting out the glue. There are many opportunities to be a Craftsman with innovative additions. Could become a barrel factory or a brewery with extra barrels included. Best looking plastic model I've made since the Atlas Mayfield Station. The fun work has been left to the builder. Building the model railroad is more fun than running trains around it for me.