Looking for info on a Snow White picture frame

[Verstehen]

My friend bought me a really awesome item she found in a thrift store. There's no information on it about where it came from or anything, so I thought maybe the folks here might be able to help. It's a picture frame, and the frame part of it is made of a foam or foam-like material. Not too soft or puffy. The foam is covered in sketches and notes from what looks like the original concept art for Snow White. There's sketches and notes mostly on the dwarves and some of the woodland creatures. The sample image inside the frame is a painting of the dwarves' cottage.

I'm just looking for more information on where it came from, maybe what it's worth, etc. It's a really cool item and I'd love to learn more about it, especially since I'm such a fan of the Snow White movie. Any help is greatly appreciated!