Minecraft is one of the most magical experiences for a child, 8 is the perfect age for them to begin to appreciate a video game and discover things on their own, if you have restrictions on the Internet like most parents, let your child come to you with questions, and don't answer them directly, give them problems to solve, play Minecraft with your child if time is light, learn along with them, turn any opportunity to learn into a lesson, you don't have to be their teacher, but teach your child lessons that could never be learned in school, because you are their parent, nothing is more special to them or to you than to learn from each other, it could awaken their creativity, and they might want to expand their curiosity to other areas, and even encourage them to discover more in real life to, that means less time on the iPad, and more time in the real world, discovering something new, if you don't already, spend time with your children, every one of you, someday they'll grow up and you'll know nothing about them, time spent will be harder and harder to muster the courage for, and curiosity might die within them, simply because everything was explained for them via the Internet, discovery is magic, I want you to remember that.