When my kids were toddlers and preschoolers, we would sit and read book after book after book. Bedtime stories were 10-15 picture books at a time. But sometimes, a parent's voice just needs a break! This site lists some websites that offer FREE online stories for kids.
Some of the sites show all illustrations and words, some are more focused on the audio portion of the story. Either way, it's great for kids and literacy development!
Check out this great list to find lots of different audio books for your kids.