Puzzler's Lexicon: A-Z Guide to Puzzle Terms & Types
Phil Janelle |
Napier's Bones STEM Education | Handmade Wooden Math Teaching Aid
Cube and Square Root Bones | For Use with Napier's Bones
Napiers Local Arithmetic Board | STEM Montessori Math Learning Tool
Genaille-Lucas Rulers for Multiplication | STEM Montessori Math Aid
Bowling Pin Wood Puzzle | Personalizable Gift and Award
Orthopedic Surgeon Wood Puzzle | Personalizable Thank You Gift
Phil Janelle |