As my bridesmaid was only 10 and my pageboy and flower girl were only 5 I kind of had to let the kids come

not to mention the bridesmaid 6 year old sister and the flower girls 7 year old sister, the bridesmaid and her sister are my cousins ( I promised Khadine when she was 5 that she could be my bridesmaid if I ever got married), the pageboy is my son and the flower girl and her sister are my best friend daughters.
We had a ball and the children were all well behaved, possibly bc they had 50 friends and relatives watching over them

they were also taken home at 9pm to watch videos and sleep on mattresses on the floor in the living room of my Aunt's house they had an absolute ball

If people look after their kids and take them home before they get tired and over excited there is no reason kids can't go to weddings, but I can also see why people may want a sophisticated adult wedding. Our wedding was a real family wedding but some people invite more friend than family. (maybe they don't have as many relatives as I do, we were just lucky that most of my relatives live too far away to come

)
As for the white out, that is just plain tacky, she could at the very least have rewritten a new invitation
