Buio is a game to help kids to tackle their fear of the dark. Despite each of us once has been a kid himself, empathise with them is one of the hardest goals you can achieve. They have a peculiar perception of things, they cannot read, they need guidance and their attention its hard to get and easy to lose. Design for them has been a pretty big challenge. These are the process and tools that helped us to define the best experience we could deliver to one of the most delicate categories of users.