3D Mechanical Wooden Puzzle, Perpetual Calendar

• [THE PERFECT HOBBY]: Whether this is your first 3D puzzle or you are looking to expand your existing craft collection, you've come to the right place. This wooden Perpetual Calendar puzzle will keep you busy as you put the pieces together. You and your family will enjoy building this model Perpetual Calendar with our 3D wood puzzle. Once assembled, you are able to set this calendar and use it as needed. Valid from year 2018 ~ 2040.
• [WOODEN PUZZLE KIT]: This DIY Perpetual Calendar puzzle kit will help you create a mini calendar that is able to last from 2018 ~ 2040. It's a masterpiece that you can be proud of. After the assembly, utilize the calendar as it was used many years ago! Assembled size is 9.3 x 3.5 x 6.6 inches.
• [EDUCATIONAL MATERIALS]: If you or your child is interested in engineering, they'll love this astonishing wooden perpetual calendar puzzle that helps promote reasoning, logic, imagination, and other key factors that affect the mind. Children will love this hands-on, imaginative introduction to the world of engineering and building your own! Includes 183 pieces.
• [QUALITY PLYWOOD]: Our punch-out sheets are high-quality and fun to assemble. The fact that our assembly supplies are made of non-toxic plywood that is safe for the environment is an added bonus.
• [A GREAT GIFT]: Finding a good gift can be hard, especially if you're looking for one that can also help boost a child's education. Our 3D wood puzzle is great for boys and girls who like to engage in STEM learning with the best interactive materials available. Give for a birthday, Christmas, or any special occasions. Recommended for ages 14+.

Each kit includes:

• Laser-cut wood sheets
• Spring Accessory
• Key
• Spring
• Shaft Sleeve
• Wax
• Steel Shaft

Mechanical Series

The Mechanical Series feature precise, laser-cut pieces that come together to form ingenious designs. Build a marble run that consists of a turn-crank, cogs, drops and spirals! You can also build a functioning record player, or even a miniature film projector.

We even have vehicle puzzles equipped with a spring motor that launches it forward up to 10 feet!