Ib Spang OlsenIb Spang Olsen.

Ib Spang Olsen (11 June 1921 to 15 January 2012) was a Danish writer and illustrator best known to generations of Danes for cartoons and illustrations, many of which appeared in children's publications. Those include a series of nursery rhyme books written by Halfdan Rasmussen, including "Halfdans ABC". However, he also wrote his own children's books, such as the whimsical tale of the seasons, The Marsh Crone's Brew.