What is the name of the building toy invented by an architect in Germany? Kind of like a jigsaw puzzle.

Wrobel, a German educator, originally decided to become an architect, but with the increase of his experience in reading the world, relying on the architectural foundation accumulated in his early years, he invented 10 toys with simple but changeable shapes, all of which are basic geometric bodies and are called "gifts" by Germans. Several of them are building blocks, which are composed of cubes, cuboids, cubes, large triangular columns, small triangular columns and cylinders with fixed specifications. These wooden geometric bodies can be assembled into different architectural styles, and they can be put together to form a cube. This is very helpful to cultivate children's structural thinking and enhance their sense of space. Therefore, wrobel's building blocks not only triggered the trend of returning to simplicity at that time, but also passed down and became a model for later generations.

From the paper net for reference.