The lazy days of summer may be over, but that's no reason to trade adventurous family outings for a never ending cycle of school drop-offs, pick-ups, and algebra homework. Instead, pack up the car and head south during San Diego Tourism Authority's annual Kids Free promotion. The citywide campaign kicks off October 1, enticing families to visit San Diego's big-ticket attractions like Legoland, San Diego Zoo, San Diego Wildlife Park, and Seaworld. Children can eat, stay, and play for free at more than 100 participating…