ABANDONED. Children's story book with picture movie within picture

[Robert]

I'm looking for a children's book series that I had during the early to mid 1970s. The term "Big Little Book" comes to mind, but not the "Little Golden Books". The books were approximately 5" x 4". When opened, there was print on the left side and a picture on the right. In some books, the picture on the right had a smaller picture in the upper right corner of one of the main characters in the book; when flipped quickly, the smaller pictures became a short movie. In one book, the main characters (Mickey, Donald, and Goofy) were in an underground kingdom where the streets were paved with gold, but lead was the most precious metal.

[Ayshe]

Whitman Big Little books maybe?

[Kris]

No response, moving to Abandoned folder.

Robert (OP) was last active on the site in July 2020.