@boomerang,
I have a mix of an australian shepard and border collie, and i'm 11 years old. We've only had our dog for about 2 months, and it feels like she's been part of the family all my life. They are definitally both great breeds for families, even babies. She's five, but she still LOVES to run, excercise, and play. They are great breeds for kids, but it also depends on the dog and their own personality. Both are herding breeds, as you know, which can be very helpful. If you teach them not to be near or go into the road, they will listen, and make sure your children learn the same. They don't have a very wide attention span, but if it's something important to them, they won't stop being alert to protect their family. To dogs, you and your family is their family, or pack. They will always protect their pack from harm. Especially these breeds. My dog will bark and growl nonstop, at strangers or when someone's coming in the door or up or down the stairs. She won't stop until you convince her it's okay, she finds out who it is, or that she's just hearing things. My dog usually only barks for about 1 or 2 minutes, but we usually have the same people over a lot, so their like her pack, too, but not as close of a pack that she is with us. So she does it less now that she knows most of the people. They can be very patient, and they don't bite unless seriously prevoked. She loves all five of our cats, but our cats are still a little shy and nervous around her, because she's new and a little clumsy. Their hasn't been any fights, though. When my sister visits with my niece, who just turned one, she is very gentle with her and let's her tug at her fur and ears, and there is no snapping, growling, or clumsiness there. They treats kids as their young, so their a little more protective of them. They also like to cling around people a lot. She doesn't like to be alone, but she's never destroyed the house or anything like that. My mom says that she's a great dog, but also a pain in the neck in the kitchen, because she's always pacing around, and herding my mom while she's trying to cook. You'll never know what their really like, until they're about 1 or 2 years old, so don't take whati'm saying too seriously, in case their personalities are way different. I hope I answered your questions and gave you a better point of view of the australian shepard/border collie mix, and I hope you will have fun with your new dog.