miniature garden; tray garden
A small, self-contained garden often created in a shallow container, tray, or box, featuring miniature landscapes, plants, and sometimes tiny structures.
My grandfather makes miniature gardens as a hobby.
This miniature garden has a tiny pond and a bridge.
sandplay therapy; sand tray therapy
Compound of 箱 (hako, 'box') and 庭 (niwa, 'garden'), literally 'box garden'. The term describes a miniature garden contained in a box-like container.