This was a well written book and gave some idea of life in Italy. I don't know how widespread "gypsies" were but the book might scare younger readers. The mischievous twins want to get away from their nurse but end up being taken in and help (against their will) with some gypsies who want them to earn their keep (through work). I was in Italy in 1983 and was warned then about the gypsies taking children (so there may be some historical background for this fiction book).

(There is not "dark" or "evil" there but it could still be disturbing to young children.)