I wasn’t a big fan of The Hobbit films (big money grab), but The Hobbit was literally a children’s book for Tolkien’s kids. That being said, I can’t say there was anything added “for the kiddies”. In terms of the LOTR films, I’m not sure what was there to appease kids that could be compared to anything Star Wars ever did. They weren’t a perfect adaptation of the books, but those movies still hold up and I wouldn’t let my young kids watch if.