We have a number of narrated eBooks for kids from OverDrive that have the words highlighted as they're spoken by the book's narrator. To see this collection
These titles must be read in the browser and you can learn more about our narrated eBooks on this page.
Additionally, a number of our Kindle eBooks (for kids, teens, and adults) support text-to-speech (TTS). This feature must be enabled on your Kindle Fire and you will need to test each title to determine whether or not it supports TTS.
You might be able to enable TTS in the Kindle app on your iPad/iPhone using the directions on this page.