All of my kids (even the ten year old!) like this app! They like to beat the shark and love collecting different fish! But, what I like is that it touches on several skills, plus has additional video elements and instructional clips about aquatic marine life! AND there are links to educational videos from (I think) national geographic if your kiddo wants to hear more on a topic! Very in-depth! Thanks and I definitely look forward to seeing something for the fourth and fifth grade range!