If the invitation named you, such as Jack and Jill Smith, that means they do not want children to attend. However, if the invitation was more broad, such as "The Smiths", then it's OK to bring your kids. Still, if your kids get fussy or disruptive during the ceremony or speeches, consider taking them away for 10 minutes so you do not ruin the magic of the moment. If your kids are ring bearers, please do not let them bear rings as they might lose them in the grass. During the reception, please keep your kids close or they could get hurt: hot food, cars, strangers, etc. If you do not want to worry about your kids, get a sitter and enjoy the party like you used to :)