Norwegian cruises is a company for young and old, most ships of norwegian cruises also have slides and the newest ships of Norwegian cruises even have a kind of race track on board! My favorite Norwegian ship is the Norwegian prima, on board this ship you will find some fast slides and the largest go-kart track at sea. Norwegian cruises is therefore a company for young and old and it is certainly fun if you have children, your kids will have a great time on board. Well i recommend you take the newest ships from Norwegian cruises. The older ones are small and have no slides. I would choose one of these ships from norwegian cruises:

Norwegian viva

Norwegian prima

Norwegian bliss

Norwegian breakaway

Norwegian epic

Norwegian escape