Marine is a great place to go with kids,from about 5 and up.
Dragon Mountain is their big roller coaster,which is GREAT.
There is a nice selection of rides, including their triple tower ride, which is apperently THE highest triple tower ride in the world, however I don't have the guts to try it.
The show, which included dolphins and walaruses,plus seals was wonderful, but the whales are not in it.
Instead, you go to their respective coves, and several times a day there are jump and splash sessions, which have a dry and wet zone.
You will get SOAKED if in the wet zone.
Large picnic areas,a handful of snack carts,and the feed-the-bear stand {there is also a feed-the-fish stand} where you buy pellets to feed them. All in all, a nice day out, though a little pricey, but if you add a season pass onto your ticket, it's a good investment.