The series includes plotlines taken from following Moomin books: Finn Family Moomintroll (eight episodes), Moominland Midwinter (three episodes), Moominsummer Madness (three episodes), The Exploits of Moominpappa (three episodes), Moominpappa at Sea (two episodes) and several short stories from the collection Tales from Moominvalley (five episodes in total). Roughly twenty episodes in the original series and dozen more in the sequel series are based on stories taken from Tove and Lars Jansson's Moomin comic strips. The rest of the episodes are not directly based on any original source material.