Kids decide the level of difficulty in their questions. ExploraNet -Don't just read about Science, actually try some experiments at ExploraNet. There's lots to learn at this site. A must to check out. He was famous for realistic paintings of people at work.
Famous art abounds here and designed for fourth grader's and up.
And don't make the same mistake many, many others have made. For that service, please see a licensed health care practitioner in your area.