Stone Abacus

Physical connections to seemingly abstract concepts can strengthen understanding. The Stone Abacus is a literal stone-age calculator for children to touch, feel and discover. Small rocks are threaded on stainless steel rungs with either oak (SEN07010490) or stainless steel (SEN07010490SS) posts. Spacers between each rock prevent the pinching of fingers as important calculations are worked out.

---

Specifications