Well, I have anti-circ bumper stickers and I just ordered an anti-circ license frame. Also, my dd sees me posting on THIS BOARD all of the time, and she hears me talking about how unnecessary circ is to other parents. I've told her what circ is and she, of course, was appalled and glad we didn't do that to her brother! My ds will become aware of my intactivism as he grows older, as well.
Some day we are going to Genital Integrity Week when the kids are older.
Also, it's very important that your intact sons realize that it wasn't just some "choice" you made to leave them intact. (Even if it felt like a choice to you at the time.) They need to know that you protected their GENITAL INTEGRITY and no one, absolutely no one, has the right to cut them unnecessarily, especially in such a private part.