Activity for Mrs. P. NYC

I don't know what to do. I got a call from a high school friend 3000 miles away because she heard about my wedding and told me how she had started looking at flights and she was definately coming. She is still in the same town we grew up in IreIand...

What is the cut off age for flower girls? How many do you have normally? I have 5 kids to choose from but I don't want all 5 because that is too much of a circus for me. It is hard to do without offending someone.