The children are presented with a short introduction to their "mission", to invent everything. They are presented with a blank screen as an analogy to this new planet. Nothing in this planet is defined. The way the world develops will vary according to the nature of the children’s creations.

The participants draw or explain their ideas to us. Emphasis is on "what does it do" rather than "what is it" or "what it looks like." The creations are given their behaviors and put into the world As and when they are completed. each creation adds to the complexity of the world and new creations can be designed to adapt or even change the world.