There are ten new buildings in Shanghai, China. These buildings are special. They are not made of bricks. The buildings were printed.
A 3D printer uses a special material. It puts this material in layers. It puts one layer on another. The layers are well connected. They will not move apart.
The walls are only three centimetres thick, but the material is very strong. It is five times harder than normal materials.
Difficult words: brick (hard piece of material which is used for building), layer (material which covers something), connected (to touch).
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