The well known Abacus, an excellent tool to teach your kids counting, maths operations and let him play with numbers.
How to use:
1- The beads in the lower part have the following values: we assign the beads in the rightmost column a value of 1. Then we subsequently assign a value of 10 to the column to its left, and a value of 100 to the column further left and so on and so forth.
2- The beads in the upper part are worth five times the value of the beads in the lower part.
3- The value of the abacus will be given in the total field, and each columns value is given under the column.