You will find some great children's stories for free online at Children's Storybooks Online.
Some have audio.
There are books for all age levels.
Some are good for a child to read by themselves.
Some you might want to read aloud or use the audio option.
Learn about the authors of these stories here.
Please share the titles of some of your favorite stories from this site in a comment. You'll help busy parents find the best stories.