Tove Jansson after Tove had become an adult, the two often traveled together, and during her final years Signe also lived with Tove part-time. Jansson is principally known as the author of the Moomin books. Jansson created the Moomins, a family of trolls who are white, round and smooth in appearance, with large snouts that make them vaguely resemble hippopotamuses. The first Moomin book, "The Moomins and the Great Flood", was written in 1945. Although the primary characters are Moominmamma and Moomintroll, most of the principal characters of later stories were only introduced in the next book, so "The Moomins and the
Swedish-speaking population of Finland and Finnish-speakers are nowadays very common. According to a study commissioned by the Swedish Assembly of Finland in 2005, 48.5% of all families with children where at least one of the parents was Swedish-speaking were bilingual in the sense of one parent being Swedish- and the other Finnish-speaking (only families living in those municipalities where Swedish was at least a co-official language were included in this study). 67.7% of the children from these bilingual families were registered as Swedish-speaking. The proportion of those who attended schools where Swedish was the language of instruction was even higher. The Finnish authorities classify