If you want to go to Mardi Gras, PLEASE do you homework because the hurricane has changed so much in New Orleans. The parade season is shorter this year in the metropolitan area. Try
www.nola.com for more information on everything New Orleans. There are fine parades outside of New Orleans, like in Houma and Lafayette, but do your homework and get the schedules. we're going to a night parade in Houma this Friday. It's usually awesome.
Being a south Louisiana girl for over 25 years, I know New Orleans to be a very family friendly place -- Audoubon Zoo (open), Aquarium of the Americas (still closed right now), the D-Day Museum (open), the Children's Museum (not sure), and the area around Jackson Square in the daytime. Done all of the above with my family many times. GEEZ, I MISS NEW ORLEANS! I hope she comes back better and soon!