First of all, very cute puppy! I'm sure she'll serve (and be served by) your family well.
I think I'd like a follow command associated with each kid.
Do you want the dog to track each child on command? It's a lot of fun but the kids must be willing to be involved. This can be taught as a tracking game. We started with the dog in a sit next to me and one of the kids across the room with a treat. I'd give the command as the dog's name and the kid's name, "Fido, Johnny" for example. The dog would run to the kid who was told to make a big deal to attract the dog. The dog would run to the kid and receive the treat and lots of praise. We then increased the distance within sight of the child. Soon the kid was asked to go into a different room as the dog watched. When the dog got the hang of that, he'd watch the kid disappear from his line of sight but start to hide. Eventually the dog got the hang of finding the kid on command. Next we added another kid's name and went through a similar process, although the dog learned much quicker, already being familiar with the process. We also had to work on my wife giving the command so the dog would respond the same way for both of us. The kids had a blast training with the dog too.
As far as other things to train for, you could teach her to carry a dog pack once she is about a year old. You could put a pack on her sooner to acclimate her to it, but I wouldn't add any weight until she is closer to her full size.
You could also teach her to pull a cart or wagon when she gets a bit older. All my dogs have been taught to pull because I enjoy dog sledding. But I've found them useful around the neighborhood or in the local woods pulling the kids in our Radio Flyer wagon, especially given the kids are small, have little endurance, and demand I carry them when they get tired.
Whatever you do, enjoy your new companion!