well here is my experience with nics, i have 2 of them at the moment, a full grown female het type 2 anery that will bite at any moment she sees an opening when u aren't paying attention and i have a smaller type 2 anery female. when i first got the small female she would bite at movement but doesn't hiss. the big one will hiss when she is bothered. nics are ok with older children i would just make sure to supervise them closely. how old is your nic? because with time they do tame down if handled often enough but u have to be patient with them. the dwarf boa subspecies tend to have a little bit more attitude then their bigger cousins the columbians, personally i think it comes with their smaller size so easier predation in the wild.