Making a Simple Abacus Using a real abacus will give you a better understanding of how to use one. The following instructions show you how to make a very simple abacus out of inexpensive materials. Decide how many columns of beads you would like on your abacus. You will need 7 beads for each column.
Most abaci have at least nine columns.
The fewer the columns, the smaller the numbers you will be able to calculate. After making your decision, begin to mark off your columns in regular intervals. Do the same on the opposite side of your box or lid. Then, using a nail and a small hammer, make 1small holes at each marking. When doing this, place the box on a sturdy object that the nail cannot damage.