Help! Need Some Good Ideas!

Tomorrow is my son's birthday. Yes I know I just had to give birth on Valentine's day. It's ok though I have come to grips with the fact that I won't have a romantic Valentine's day for awaile. I need some ideas on what else to get for a 6yr boy. He likes fire trucks but if I have to buy another one I wll rip my hair out (I have probably bought over 50 fire trucks since he was born). Every time I ask him he says " I dunno another game for the PS3" I just don't want him sitting on his butt playing video games all day long. So please help, any thoughts would be great!