Andy just posted this photo from Eames Demetrios' flickr stream. It's an actual prototype for a kid-sized shell chair, on exhibit in an exhibition of Eames prototypes at the Vitra Design Museum.
I'd rewrite that sentence, but the odd proportions of the shell and those weird little bent wire feet have thrown off my concentration. I think I like the knock-offs better.
Previously: Whoa, bold move. Mini Eames knockoffs called "Mini-Eames"