Riding the Green Lobster

Images from Karel en Mienet 1 [link] and 2 [link] by Marietje Witteveen with illustrations by Eddy Dukkers (Eduard Willem Anton (Ed) Dukkers, 1923–96), ca. 1950. Follow those links to read the books (and 850 others) in full at a huge Dutch library site. I've been marveling at this archive since BibliOdyssey featured it in 2009.

back cover, 2

back cover, 1 (I'm not sure what animal that is)