I think that it would all depend on the child. I have three kids, ages 4, 5 and 7. All three of them are really good with the rabbits. They are gentle etc. But, at the same time.. I dont leave their side when they are playing with the rabbits. Just in case! Maybe you could ask the parents if the girl is going to be expected to take care of the rabbit all the time, or are they willing to step in and help out? Where will the rabbit be housed? In her room or in the family room? Also remind them, that as a child, they are very interested in animals at first, but then the novelty does wear off and the animal may get ignored, neglected, not properly cared for because the child lost interest. This does not happen to everyone but it does happen far too often. Are they prepared to play with the rabbit, pet it etc in case the child gets bored of the rabbit??