Every child knows dice. There is no fear of contact. Everyone knows that you can roll a dice. It feels good when you turn and twist a dice. What's on the other side? When the dice rolls, you watch with excitement. The sound ends. Only now do you know what you have rolled. People have been fascinated by dice for thousands of years.
There are no sharp edges and they are all shaped the same. If you like, the cube embodies the simplest shape a building block can have. The outer shape is simple. It is easy to line up and stack. At the same time, however, there is a different picture on each side (colours, quantities and much more).