Pure Wood Pestle and Mortar
Woodturning - bracelet
Analyzing the proportions of Cindy Drozda's Onion Finial
How to Use an Abacus: 11 steps (with pictures) - wikiHow
I always thought that the abacus would make a great math lesson. perhaps for the lower elementary children
How to make an abacus using craft sticks and beads
The Abacus Bracelet. Beautiful and a little nerdy- I wish I had the patience to actually make this!
Soroban (Japanese abacus)