one more thing - you may find useful - in city cbd - there is a "coles' - supermarket - its on the corner of george and king street as wll as a woolworths at town hall station -corner of park and george street - both supermarkets great for stocking up on "snacks" - juice poppers etc ...unfortuantely if admission prices are making eyes water - the cost of food inside will make you cry!...take the snacks and drinks, buy the hot food! for maps etc use www.whereis.com
Also in city are 2-3 Mcds - the best for you guys is the food court underneath Myer city (department store) - heaps of other food too - KFC, subway etc etc....