Discover the charm of combining art and science with the **Steampunk Wall Clock 3D Puzzle** by WOODEN CITY. This captivating puzzle set allows you to construct functional steampunk-style wall clocks complete with a pendulum, creating a stunning decorative piece. Piece together all the parts and mechanisms and marvel at its operation. Once assembled, it becomes a unique fusion of technology and beauty, making it an extraordinary gift for lovers of elegance and surprise. - **Adjustable clock precision**: Set via pendulum. - **Working duration**: Up to 12 hours after winding. - **Difficulty level**: 4 out of 5. - **Estimated assembly time**: 5 hours. **Features:** - Functional mechanical model. - No glue or tools needed for assembly. - Made from high-quality natural materials. - Detailed craftsmanship with ecological birch plywood. - Comprehensive pictorial instructions included. **Educational Aspect**: This 3D puzzle applies the STEM concept, tying together disciplines of Science, Technology, Engineering, and Mathematics to deliver an insightful learning experience. **Additional Tools Required**: A utility knife, scissors, sandpaper, and a wax candle (not included in the package) for waxing gear wheels to ensure optimal function. **Technical Specifications:** - **Material**: High-quality birch plywood. - **Assembled dimensions**: Approximately 36.4 x 70.8 x 9.6 cm.