The mission of the Read-Along Adventures site is to assemble the audio and scanned pages from every Read-Along book ever created — these were the short picture books that came with a 45RPM record that narrated them, with cues to turn the page as necessary. Where possible, the curator has recreated the Read-Alongs as Flash apps. There's even audio for the Haunted Mansion record. How lovely!
(Thanks, TimK!)