Janczarski was the creator of kids' biweekly Mis (1957), and for many years he was editor in chief of the publication. Also, he is the creator of Miś Uszatek, one of the most popular characters among Polish children. Janczarski wrote several books and helped create several animated movies about Uszatek's adventures, they were illustrated by Zbigniew Rychlicki.
He died unexpectedly, during a meeting with children in Siedlce he had a heart attack, and died in a hospital in Warsaw a few days later. Janczarski, author of many books for children was awarded with several orders.[2]
References
^"Info". cmentarze.um.warszawa.pl (in Kinyarwanda). Archived from the original on 2021-01-19. Retrieved 2021-02-02.
^Karol Estreicher jr, Dziennik wypadków, t. I (1939-1945), Kraków 2001, s. 408; D. Matelski, Karol Estreicher jr 1906-1984 – biografia wielkiego Polaka, t. II (1939-1945), Kraków 2017, (s. 513)