Object: Assemble the wooden pieces to make a working 20 minute timer. UGEARS models are a unique combination of wood and mechanics.  UGEARS feature easy-to-assemble wooden pieces and gears that actually move that will bring delight to novice and experienced modelers alike.  Made with laser-cut high quality plywood, there is no glue required to assemble these intricate masterpieces.  Detailed step-by-step color instructions are provided in 10 languages.