Yes, RIRs are very aggressive. My mom loves them, I like them, but hate their behavior.I would not recommend RIR specifically because you have kids in my experience is that they attack and are so mean. I even bought the show type expensive pure breed RIR and they are also mean get a salmon faveroll rooster and 2 salmon faveroll hens or a brahama rooster.
I've had several RIRs when growing up.