Children are responsible for nearly three quarters of deliberately lit fires. There are two basic groups of child firesetters - those who are curious about fire and those who light fires with deliberate intent. Curiosity firesetters are typically quite young (five to ten years old) and usually have no criminal intent. On the other hand, the reasons older children light fires are usually to do with aggression, vandalism, antisocial behaviour, sensation or attention seeking, or in response to social skills deficits.