[2] As an episode of the animated TV series it originally aired over SVT on 1 April 1994.

[3] Milla says that Alfons has stolen the key to a treehouse built by him and his friends.

He returns to the treehouse, and begins to search for the key.

He doesn't find it, and when no one wants to play with him he feels lonely and continues searching.

Suddenly Milla calls, and says it was a magpie who took the key.