This is a modular building block toy that integrates storage and floor. The cover of the storage box is a building block bottom plate, and the guide rail slot is reserved on the side of the box, which theoretically supports unlimited expansion.
The particles and the bottom plate have been adjusted in size in several versions, and the tightness is already very comfortable.
Large particles of building blocks, more suitable for children to eat

Side design of the slot rail, theoretically support unlimited expansion

a small house made of regular bricks

Bricks of regular