This is a perfectly designed DIY kit that requires your patience to complete, no glue needed. This mechanical wooden puzzle toy uses precision laser cutting of high-quality plywood. The materials are safe and environmental friendly, with no peculiar smell. This toy kit combines the vintage charm and the mechanical power which is very attractive. After assembling it, you will achieve a sense of accomplishment. What's more, you can get a special decoration. Pay attention that do not put it in a wet place.