- An Instrument For Performing Calculations.
- Calculations Performed By Sliding Counters Along Rods.
- Its Primary Purpose Is To Teach Arithmetic To Children.
- Two Colour Unit.
- 120 Beads.
$ 54.00
$ 0.00
$ 54.00
$ 0.00
$ 35.99
$ 35.00
$ 121.00
$ 26.00
$ 54.60
$ 42.00
$ 80.78
$ 62.14
$ 54.00
$ 259.99
$ 90.00
$ 20.00
$ 130.00
$ 90.00
$ 45.00
