The life, times and artwork of a Danish animation pioneer.
I don't think this is for a Kellogg's commercial. Kaj worked on an anti child-abuse film for Latin American countries if I recall correctly. I believ these characters may be Brazilian street children. There was an older charcater named Karate Kid or some such that warns the younger ones. If I recall correctly.
Yep, it is a gag drawing. Special K: K for "Karate" of "Karate Kids"