It is a wide world out there and there are many problems to solve. People usually pick a specific niche and start working on a product that solves a concrete problem in that niche. One of the most interesting niches are tied to children, simply because they do not treat our new-age devices the same way as we do, when we are older. There is a lot of focus on User Experience, Interaction and Design of the application and a bit less on the code quality. We will talk about tips and tricks that I've learned in more than 1 year of developing apps for children, including testing and improving our apps.