There are all kinds of stuffed animals out there. One that i've seen are neopets. They are cute, but some are really crazy looking. They are colorful, and not the "nromal" animal.
I am not sure if these exactly count as "animals," but there is a company that makes stuffed microbes. I have seen them at museum shops. You can get mono or the flu. Some of the ones I saw came in sets of multiple microbes. Is that what you mean by mixes?