Introduction: How to Make a Knex Abacus/soraban
This is the abacus/soraban I made a few days ago. It works well, and I like it.
21 green rods
8 white rods
8 yellow rods
36 gray 4 slot connectors
6 blue 7 slot connectors
8 blue spacers
32 gray spacers
It's done! I am glad I made it and I hope you like it.
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Please be positive and constructive.