Napier's Bones - Quickly teach Your Child Math With This Montessori Toy escape roomw aiting room puzzle A classic Grille Cipher laser

A classic Grille Cipher laser cut from ideal for the Escape Rooms Experience

The disks may also be useful as a teaching aide in learning Braille

This model is our Acrylic version

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Made from durable maple and alder wood

Napier's Bones - Quickly teach Your Child Math With This Montessori Toy escape roomw aiting room puzzle A classic Grille Cipher laserDesigned by John Napier in 1617, Napier's Bones is a fantastic way to explain and help your child understand how basic math functions. Consider the first "calculator" Napier's Bones is an invaluable to in any classroom environment. Whether you are a teacher in a traditional classroom or a parent homeschooling this is an essential ingredient to you curriculum. The frame measures 7. 5" x 7. 5" and the rods are cut from 1 8" thick alder wood. Two full