Dean & Son
... that the 19th-century London publishing firm Dean & Son was the first to mass-produce children's toy books with movable pictures?
... that the 19th-century London publishing firm <b id="mwDX0"><a href="./Dean_&amp;_Son" id="mwDX4" rel="mw:WikiLink" title="Dean &amp; Son">Dean &amp; Son</a></b> was the first to mass-produce children's <a href="./Toy_book" id="mwDX8" rel="mw:WikiLink" title="Toy book">toy books</a> <i id="mwDYA">(illustration pictured)</i> with movable pictures?