What would you bring to the fair

I have a son who’s 7 and a 6month almost 7month old baby girl.. my son has always went to the fair around here and he knows it’s starts on Tuesday. So I plan on taking him. The thing is, not sure what to bring or do with my daughter. The fair is normally really loud and packed with people. She does well with noises but not sure with crowds.. what would you do or bring to keep baby calm? Or should we just skip it until next year