That's really cool having the family wanting to get into it. A few more cars to throw out there: VW Golf/Rabbit GTI, Hyundai Tiburon V6, maybe dig up an older mustang. may not be the most competitive, but definitly good family fun.
/\ /\ ST Crew #77 /\ /\
06 Focus ZX4 ST
F2 Intake, Trubendz 2.5in w/hfc, Eibach Pro springs, FRPP dampers, Motegi Tracklite wheels