Bolek and Lolek

… also known as Jym & Jam and Benny and Lenny are two Polish cartoon characters from the children’s TV animated comedy series by the same title (Bolek i Lolek in Polish). They are based on Władysław Nehrebecki's, and were partially created by German-born Alfred Ledwig before being developed by Władysław Nehrebecki and Leszek Lorek. The series is about two young friends and their fun and sometimes silly adventures which often involve spending a lot of time outdoors. They first appeared in an animated film in 1963.