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  • 【Wooden Calendar Puzzle】Can you find another way to know a future except looking at the calendar on the PC or the paper version hanging on the wall?This beautifully different wooden canlendar building by yourself is the answer.

  • 【Fun Building Project】It takes 1-2 hours to build this craft kits following the instruction book. All the pieces were easy to remove from the overall board and fit together nicely.

  • 【Nice Desk Piece】This Beautifully Designed Perpetual Calendar is allow the calculation of the day of the week for a given date in from year 2018 to 2040.Surprise your family, friends and colleagues with this mechanical Perpetual Calendar Desk Piece.

  • 【Great Gift 】This 3d puzzle can be educational to your family members, very attractive brain teaser puzzle set. Recommended age 14+. Our eldest customer is up to 92 years old.If you have steady hands and patience then the only thing left to stop you is your eyesight.

  • 【Operations】1. Rotate the year gear to select a year 2. Keep the year gear fixed, and rotate the month gear to select a month 3. Then the Calendar plate will show the  of the month you choose.

  • ROKR 3D Wooden Puzzles Model Kits for Adults Birthday Gift Mechanical Model Building Set Perpetual Calendar