I am so excited about this app! iLearn Solar System is an app that is sure to please your inquiring solar system minds OR your child that could care less! I think this one is great. You are led around the solar system by Zooby and Astronaut Ashley - and they teach you facts that will keep you learning for along time! I was impressed - the amount of information they cover is generous and it's not easy - my first grader will have a ways to go before this one is too easy for her! I think your older kids will REALLY appreciate this one! Fun app and challenging as well - we like that!