Tumi-Isi Wooden Stacking Rocks Toys Stria is engineered to be

Stria is engineered to be intuitive

From its beginnings in Oklahoma City in 1927

The generous format and two-part design structure allows designs to be shown in detail

Perhaps this is the key to their enduring appeal

Tumi-Isi Wooden Stacking Rocks Toys Stria is engineered to beThese tactile objects are meant to nourish your sense of balance and creativity, while also transporting you back to that river where you stacked stones as high as you could. Designed by Nara based studio A4, tumi isi (; 'stacking stones' in Japanese) are a set of 5 blocks individually hand bevelled into asymmetrical shapes by local artisans. Made from the finest woods of Yoshino Cedar and Yoshino Cypress, the blocks are coated with natural pigments