So I was thinking about when is a good age to start sharing the "birds and the bee's with your children. What age do you think is an appropriate age to talk to your children about sex? Also, are there any methods we shouldn't use to describe it? I was considering a puppet show for the younger ones to detail how this process occurs, but I am not sure if it will keep their attention. What are some appropriate methods for this?
It should be an ongoing dialogue throughout their lives, and each discussion should be tailored to that child's maturity and understanding level. Kids "discover" their private parts pretty young, it's completely natural. That's the time to explain that everyone has those parts, and they're private and only be to be seen or touched by a parent or doctor (or whoever else cares for the child). Some children, as young as toddlerhood, discover masturbation, but some don't; you really need to just know your child and what he/she is capable of understanding at each stage of life.
As for "The Talk" where you sit down and just lay all the graphic details on the line, I'd say it needs to be done before puberty for two reasons. One, our current society is throwing sexuality at kids at younger and younger ages, and there is very little innocence left in secular society. And two, once a kid reaches puberty, they're in the throes of the most awkward and self-conscious phase of their entire lives, and they may clam up and feel mortified if you suddenly sit them down to talk about sex. An 8 or 10 year old is old enough to understand the terms, the body parts, and the "logistics" of it, but less likely to feel mortified and like they want to disappear under the table lol. Also, if you've prepared them by keeping an open and honest dialogue about sex all through their young lives already, they're much more likely to feel relaxed and open when you have the big sex talk.
So, start young, as soon as they notice their own body parts, start talking about them (appropriately, of course). Keep up an open and candid dialogue all through their childhood. And make sure they know the whole scoop before puberty strikes. And then KEEP talking about it all through their adolescence. Talk about relationships, feelings, temptations, purity, and what your family believes is right and wrong. Encourage them to ask questions, approach them regularly to see if they want to talk about it.