- An Instrument For Performing Calculations.
- Calculations Performed By Sliding Counters Along Rods.
- Its Primary Purpose Is To Teach Arithmetic To Children.
- One Colour Unit.
- 100 Beads.
$ 54.00
$ 0.00
$ 54.00
$ 0.00
$ 88.17
$ 67.82
$ 77.42
$ 59.55
$ 79.01
$ 60.78
$ 59.93
$ 46.10
$ 60.85
$ 46.81
$ 22.00
$ 19.99
$ 155.00
$ 68.00
$ 49.00
$ 29.95
