Exactly that! *My tachi calls them "blind boxes"... like a "case of blind boxed assortments". *They are fun to shake gently... though some assortments weight things so you can't tell what is what. Party poopers.*

So all look the same on the outside, but "different things pictured on the outside on the inside".

THAT makes total sense. *Sorry... tired here. I've noticed that both "designer toy makers" like Quee etc etc do them too.