Kalle Stropp, Grodan Boll och deras vnner is a 1956 Swedish animated feature film directed by after an original script by Thomas Funck, using Funcks already wellestablished characters. It follows a shorter film made by the same team in 1987, Kalle Stropp och Grodan Boll rddar Hnan. This is the first time since before 1987 where a Kalle Stropp production features voice acting by others than only Funck himself, only with the exception of children that had participated in other productions as well.
Source: Wikipedia