Rabbits are timid and gentle pets.
Since your kids are rather young, supervision is needed when playing with the bun. All the best, and let us know what you decided. I'll give it a try. Nevertheless, I have 2 rabbits, they use to live indoors until I couldn't breathe anymore and now they are in the garage. I think they would be happier indoors and wish I could provide that for them so you may want to consider another pet.