3D Wooden Puzzle Perpetual Calendar with Mechanical Gears - Brain Teaser Building Set for Adults | Engineering Toy & DIY Wood Craft Kit | Perfect Birthday Gift for Husband, Wife & Family | Home Office Desk Decor & STEM Educational Activity

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. Perfect Design/Creative Gift Rotate the gear to lock the year and month disc with your hand. Creative gift for your friend who is model builder or puzzle lover.It looks so cool and creates a decent challenge for an adult. What a fascinating thing to see the mechanical miracle coming to life by your own hands. 3D Wooden Puzzle Specifications: Name:Perpetual Calendar 3D Puzzle Material:wood Assembly size:about 175*90*170mm/6.89*3.54*6.69in Packing size:about 320*235*39mm/12.60*9.25*1.54in Number of parts:52 pieces Assembly time:about 0.5-1 hour Applicable age:over 14 years old Packing List:1*Wooden Puzzle Model Building Kit

【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.

【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.

【Ideal Gift】Create an unforgettable time of puzzle assembly between you and your child.Suitable for family ties.A great gift for adults,teenagers,family,friends or yourself on any occasion such as birthdays or anniversaries.

【Fun Building Project】This 3D wooden puzzle kit is composed of 52 pre-cut small wooden blocks and needs to be assembled by yourself.The whole process takes about 0.5-1.5 hours.

【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.