Hello! I have a very long passion for assembling various wooden models and I would like to recommend 3d mechanical puzzles , where you can find a large selection of 3D wooden mechanical puzzles. This site offers not only different models, but also instructional videos to help you understand how to assemble each model. The site also has reviews from other users to help you choose the most suitable model for you. I have personally bought from this site several times and have always been satisfied with the quality of the products and the quick delivery.