About: I paint, write music, and used to build knex guns. I have a Bachelor's Degree in Studio Art. - updated 5/7/2014
More About Oblivitus »
Intro: Knex Abacus
Counts up to 999. It's made to be used as a hand held or table top.
Build from the pictures. There are 9 blue spacers per line. I will not be making an instructable. The pictures were generated on Mlcad.