Maybe Moose River up to Agnes? That's easy and Agnes is a decent place to hang out for a couple of days. And if the weather is good (meaning no wind), you could do a day trip on Saturday up to LLC and check out Warrior Hill and the awesome pictos.

Another choice might be Mudro up to Horse Lake. The first campsite on Horse across from the portage where you come in is full of "domesticated" animals that your daughter might find entertaining. I'd never seen woodchucks at a campsite before that one! The first portage out of Mudro can be a tough up and down, but otherwise the route is pretty easy.