We must know how much we put in to make the concrete.

waiting for the model.

This is the project what I made, it is a small island on the sea. Maybe I can paint bule color on it later. The tree is made by 3D printer ,and use the hot heal gun to ban the leaves. The thing you must care for is the propertion when you made the concrete, here we use 300 gram earth 100 gram sand and 30 accelerometer.