Yeah, those are good examples of family friendly entertainment that have been successful. There are a ton of "family content" watch groups online that could also help you out. Just see what they are complaining about and don't do that.
Simply put, try to remember you are making entertaining more children and people raising children. Mostly simple conflicts with easy to comprehend resolutions. No demons, no nudity, no cussing. The trick is to find a way to do it that doesn't sound like you are preaching your own values to them. Remember, you are trying to be entertaining. No one, children included, like to just be preached to. Unless it's a G.I. Joe public service announcement.