Make a pocket abacus from an empty Altoids tin. The original low-tech calculator, now in pocket size! Great for calculating tips in restaurants, as long as your check isn't more than  a million dollars.

Step 1: Materials

Materials needed:
Empty Altoids tin
small colored beads
an awl

Optional: spray paint, craft paint
Super awesome and handy...
Made it up to 10 rows!
Oh I really like this idea and I'm brainstorming how I can bring it into my art room!
Thank you for this instructable. I needed an abacus for keeping track of stitches while knitting. I didn't have an Altoid's tin, but I used a little box that a necklace came in and it turned out beautifully. I made a Japanese abacus rather than a Chinese one, though.
That turned out great!
you made me lol at the end, nice. love the idea!
Great idea! :D

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