I feel like I’ve gone insane but I swear I remember a version of The Lion, The Witch, and The Wardrobe where the kids start out as live action and turn into cartoons when they go to Narnia. I can’t find anything on any search so I was hoping someone would remember it, too. I can even recall in school being upset because they showed the wrong version and that version (1979) is the only cartoon one I can find.
Wondering if maybe it was confused with The Phantom Tollbooth? https://www.youtube.com/watch?v=pZ1ldmMzmvk