Pay in 4 interest-free payments of $10.69 Learn more
Ships within 48 hours · Estimated delivery Aug 24 - Aug 29
and brain-bending
Such a dilemma
This puzzle can be personalized (choose the engraving option) with a name or message
Base is USA Hickory
Napier's Bones | Handmade Wooden Math STEM Teaching Aid homeschool math game and brain-bendingNapier's Bones is a handcrafted wooden reproduction of the multiplication aid invented by John Napier in 1617. Before calculators, students and tradespeople used the marked rods to multiply, divide, and find roots. The base set ships with two complete sets of rods (0 9), a storage base, a wood cover, and printed instructions with worked examples. Optional square root or cube root bone add ons at checkout. Includes: storage base, 2 sets of rods 0 9,
