- 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.
$ 50.06
$ 65.08
$ 50.06
$ 65.08
$ 69.99
$ 58.99
$ 69.07
$ 53.13
$ 87.50
$ 78.01
$ 60.01
$ 80.00
$ 30.00
$ 84.23
$ 64.79
$ 59.40
$ 45.69
$ 24.99
$ 48.99
$ 39.99
$ 24.99