What similar educational toys are there in Nine Rings?

1, Lubansuo is also called Kongmingsuo. It is said that during the Spring and Autumn Period, Luban made a detachable toy, which was later called Luban Lock. Luban lock originated from the tenon-mortise structure in ancient buildings and was completely supported by its own structure, showing an extraordinary wisdom.

Tangram is an ancient traditional educational toy and an invention of ancient working people. Tangram consists of seven wooden boards, which can be spliced into triangles, parallelograms and other shapes.