"One would hope that every pre-schooler in this country is taught why they should not play with matches. But your offending involved a premeditated act of wanton destruction resulting in losses of $60,000 for the owners and their insurance company, and the only benefit to you it seems was a few minutes thrill watching the ferocious fire," the judge said.
Armed with a baseball bat, Sylvia smashed council signs, the front door and several windows of the house before Harris set alight blinds in a cupboard.
Sylvia was also sentenced in relation to the burglary, assaulting a police constable, resisting arrest, sustained loss of traction and two charges of shoplifting. Sylvia is also subject to judicial monitoring for 12 months and was disqualified from driving for six months.
Harris, 18, from Welcome Bay was earlier sentenced to nine months home detention and 200 hours' community work.
Brad David O'Keefe, 18, from Greerton, who drove the getaway car, was earlier sentenced to five months' home detention and 150 hours' community work.