Having one boy who is the sensitive scholarly type, (til you get him in the garden or the barn, that is) and one who is more action and rough-tough, I'm not sure just HOW one goes about moulding that part. The older one grew up with his almost-twin sister and they lived much more in their heads than the youngest who only slows down to sleep and read. But show them the best you can be, give them LOTS of hugs and read to them and them read some more. Sing to and with them. They want to be like you, at least for a while and then if the basics are there they can make their own decisions and you can trust them. BTW, they will start making life-and-death decisions EARLY. Like crossing the road, not sticking things int electrical sockets, etc. And what one doesn't think of the other one will. Don't assume they're too young. Teach them.

And one last thing. It keeps getting more fun. Teenagers are great! (So are twenty-somethings. I have two of those now...)