I was browsing the children’s section of Barnes & Noble with my daughter last week, and ran across this interesting bit of packaging. (It was lying on the floor empty, so I’m guessing some child snatched or mislaid the contents, but you can see them in the product page on Amazon.)
I think this could be a really attractive way to market RPGs, particularly to the younger audience. It would be great for small pamphlet-sized games and paper minis, but I suspect the manufacturing and distribution costs would be too expensive for most companies outside of Wizards/Hasbro. Another problem is that, with this size, you’d also have to use smaller-than-normal polyhedral dice if you wanted to include them in the packaging.