Urtin, an alien child, comes to visit Earth with his parents. During his travels, he discovers the marvels of this planet and the foolish, and smart, things humans are doing. The Space Kid is visiting us to tell all the children of Planet Earth that they should take the future of the planet in their hands because it is also their own future. Our World needs to radically change the basis that sustain its economy and redirect it towards sustainable development. This Kid Story aims to educate children about sustainability and its principles, so they also will constitute ethics and knowledge to accompany them throughout their lives, in their struggle to maintain a world that operates sustainably, both socially and environmentally and economically.