We all know how difficult is to 'teach' the 3D shapes to young children. In time, I discovered a way to do it, actually to 'watch' it as the children will create their own 3D shapes so that they understand the difference between them and the 2D ones.
These structures leave children explore their vision and their creativity. I only demonstrated the technique insisting on the fact that a structure/building has to balance itself in order to stand up, otherwise it collapses. Then, I let them free to create their own balancing structures.
