If your looking for pole benders for the kids to get into a couple of good bets are white bass fishing and soaking crawlers and live bait on the bottom for what ever swims by.
Look for white bass around opener, may and into june. You will see them feeding on the surface around ends of islands and channels going into the back waters. When they are hitting the surface they are in feed mode and just about anything casted out and retrieved close to the surface will get hit.
Another great way to get the kids into some fish is just soaking bait on the bottom and catching what comes by. Crawlers and minnows work well for this. There is not a fish that swims in the river that wont eat a crawler. For a presentation try jigs or a slip sinker and a hook. Sometimes a small bead added to the hook will help attract fish. You will be surprised at what you can catch with this simple approach. As far as location just about anywhere works. there are fish everywhere in the croix. If you dont like what you are catching in one area try a different spot. As you put time in doing this you will start to learn what fish like what areas. Good starting points may be current breaks and small channels going into the back waters.
Hope this helps. Check back often as opener on the croix is coming up and this forum should become a lot more active.