I've tried this: This is a GREAT origami tutorial for a fox. It gets a little bit confusing, so I don't recommend it to total beginners, but ultimately it makes a cute origami fox that can stand up on its own.
Kids love nature and enjoy creating artistic representations of animal life. Take a look at these homemade animal themed toilet paper roll crafts. They are cool, fun and could be a great project to do with the kids.