Die Wunderfahrt by Sandor Bortnyik & Albert Sixtus
I came across this beautiful children's book via Manufactum (you can purchase it via Manuscriptum). It was first published in 1929. Really like the brightness of its colours. The Hungarian artist and illustrator Sandor Bortnyik was part of the Bauhaus. Have a look at his work.
(Sandor Bortnyik/Albert Sixtus: Die Wunderfahrt, Alfred Hahns Verlag)