The steel cubes are passively magnetized, so the model has certain stability. Nevertheless, as soon as users would like to modify the model, it can be removed and rebuild easily and fast, with the same steel cubes as used before.
This way of rapid prototyping shortens waiting time enormously, compared to other methods like 3D-printing or milling. With this support, ideation processes can be performed way faster.
We built a prototype which piles up little steel cubes (6x6x6 mm³) in columns and visualizes a given 3D shape.