The Maui Ocean Center is nice and clean. The variety of fish on site is wonderful. If you get a chance to sit in on the informational speaker at the Shark Tank, do it! We learned a lot and enjoyed the stories shared.
We ate at their restraunt rather than the food court, had great service and a good view of the harbor.
The entry fee seems high, but there are savings to be found if you do a little research before you go. We booked our tickets on-line in advance to save.
Plan to spend 2-3 hours.

Our family of four all throughly enjoyed the Nakalele Blowhole. The hike to the blowhole was easy for our 6 and 8 year olds. The blowhole was impressive on the day we visited, shooting anywhere from 4 to 20 feet in the air. Also a great place to take beautiful pictures!