Ages 14+
Ages 14+

Perpetual Calendar

$34.954.9

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What you get

Seize the day with this mechanical flip calendar that can be used year after year. Construct the date and day-of-the-week tumblers, add the month dial, then put them all together using a marvelous mechanism called a Geneva drive. Explore the evolution of perpetual calendar design, then read about some kooky calendar calamities through the ages (from skipped leap years to the Y2K bug)!

Product line:eureka Crate Logoeureka CrateQuestion mark graphic

Additional details

Reviews

4.9

12 reviews

Tori
Mar 30 2020

I liked the history of calendars and learning about gears and manual systems.

Meredith
Mar 15 2020

Creative idea, easy to assemble, something he will use

Elizabeth
Mar 12 2020

It was complicated but still fun to put together.