We went to NOLA from 12/22 to 12/25 but before going I thought I had done my homework on hours of operation, fees, etc for each of the items listed on the Power Pass.
Power Pass is a one price-save you money on 1, 2, 3 or 5 day visit. IT REALLY DOES SAVE YOU LOTS OF MONEY IF YOU ARE PLANNING ON VISITING AT LEAST 3 OF THE SITES but what they do not tell you until you ask is, they don't control who is open or when they close.
There are 7-8 Louisiana museums (including Children Museum), and even though the sites say they are closed for Holiday, they neglect to tell you that they are also closed THE DAY BEFORE and about 80% of all the sites are closed on Mondays.
I called each sites listed and got their holiday hours, which were shortened or closed, to see if the Power Pass was worth the expense. Ended up it was worth seeing the Aquarium, doing the Bus Tour (3 hours), the Paddle Boat excursion (2 1/2 hours) and the World War II Museum (2 hours).
Good idea to buy a full day pass for the bus/trolley for $3 per person-good for 24 hour period