What Is The Wording For A All Adult Wedding And Reception No Children At All?

If I wanted to do that, I'd offer child care with separate alternate activities for the 12 and under set (figuring that by 13, people can usually manage not to be disruptive, but I suppose you might draw the line someplace else), and include a little spot on the RSVP card where people could tell you how many kids they'll be bringing and the ages.  Then, if anybody actually says they're bringing kids, hire a babysitter or two and tuck the kids away in another room where they won't get underfoot.  Give them some games, and maybe a TV with cartoons and popcorn, and they'll have more fun than they would have had sitting still through the wedding and reception anyway.  

Other people who are a lot more direct than I am might just specify that it is an adult-only celebration.