Toca Nature ($2.99 - No IAP) is a sandbox game much like Minecraft for Kids. Players are able to build and experiment in a variety of animal habitats.
Pro Helps kids learn about nature
By giving children the option to experiment with animal habitats and eating preferences, they learn the temperament of certain creatures. Of course this app isn't going to provide the same experience as real nature, but it's a good place to start.
In order to learn about specific animals' diets, players can ask them what their favorite foods are through a speech bubble.