It's really easy to navigate through the lessons and projects in the app! Also, if you go through the projects at the recommended sequence, the repetitiveness of some exercises/projects (i.e. multiple projects that get you to build the same thing, but are phrased or situationally different from the first few projects), allows for the child to get a better grasp of the concept. Additionally, by incorporating real-life items (e.g. simple project to create a siren, which was actually a combination of the buzzer and the light--- this is brilliant!), it encourages the child to think logically and to relate the available IQube blocks to build what is being asked for. It's pretty much fool-proof (the magnets don't align if you connect the wrong side of the block to another block), even without the guidance of the app. This is highly recommended for learning and understanding circuits!