We took our kids to New Orleans last spring break. They were 14, 12, and 8. We had a great time.
We stayed at Bayou Segnette State Park. This was a very nice park, I would stay here again. No need for bikes.
We went to the aquarium, we've seen better.
We did the river cruise to Chalmette battlefield through the National Park. That was a fun cruise, and there's a buffet that the kids really liked.
We had a fabulous time on the airboat. Be sure to go to Jean Lafitte airboat tours. Their family owns part of the national park....we talk about our experience frequently. It was more educational than I ever could have guessed, and it was just fun.
I highly recommend visiting Jean Lafitte national park and walking through the bayou. It's an easy walk, but beautiful.
Also, the best plantation around is Oak Alley. It's beautiful. But it's busy. If you go near the end of the day instead of the beginning, you'll miss the multiple tour buses that are lined in waiting in the morning and you'll nearly have the place to yourself.
This is my own photo. We were the last tour of the day and nobody was lingering on the front lawn.
Enjoy!!