Educational programs that highlight the importance of reducing energy consumption not only save resources but also inspire a new generation of conscious citizens. By encouraging students’ active participation in energy efficiency initiatives, schools not only promote sustainability but also become agents involved as multipliers, taking the knowledge and practices they have learned to their families and communities. In this context, this chapter presents the development of a game called “Pluguinho” aimed at children, which aims to study concepts about energy efficiency, through usability tips and reports on the energy consumption of common household appliances. The game is developed for Android operating systems for smartphones and tablets. The design of the game interface revolves around a friendly interface using a mascot that aims to establish an empathetic connection with the user. The application uses geometric shapes referring to technology, smooth lines, and semantically reinforces the idea of preserving the environment. Connections and allusions to the use of electrical energy are created so that the child understands its importance. It will be demonstrated that this game can be a highlight teaching tool, addressing the fundamental concepts covered in an accessible and playful way for young people and children.