A classic magnetic building toy made by Chinese brand. The set contains metallic balls and colorful rods of equal shape and size. The toy is simple, but very versatile, and you can create all kinds of shapes from these parts. The magnets are strong enough to keep the assembled toys together while children move them around.
The must stable and sturdy basic shape you can assemble with this set is a simple pyramid. By repeating this structure, children can learn basic engineering principles and create big and complicate sculptures which will actually support their own weight.
However, magnetic pieces of this set are strong and relatively small, so they may be dangerous for smaller children.