I started talking to my kids about sex at a pretty young age - probably 7 or 8. I went to Mardell's and they have a great section of books. They are age appropriate and start with age 5. I used them to talk to my daughter and it awas very helpful. We read a little each night. They are honest, age appropriate, and give the Christian Perspective on sex. When your kids turn 12 - there is a study by Family Life called Passport to Purity (they don't recommend for kids under 12). It's a weekend retreat in depth study. I'm taking her to Great Wolf Lodge and doing that with her this summer. My husband took our son on a fishing get away. There's also a Christian Retreat lead by Rebecca St. James that is for girls 12 and over called Revolve - it talks about modesty, purity, and self esteem issues. I can't wait to do that with her! There are lots of great tools out there! I think it's great you are being proactive. Kids talk - alot! My kids know they can always come to me for the right answers. NOw my son is 16 and has a serious girlfriend, and knowing that we talked about God's plan for sex and marriage, knowing his girlfriend like I do - and her committment to stay pure until marriage makes it easy. They understand the limits we put on them and that it's not to spoil their fun, but to help them remain true to themselves.