56 mil for three days is a decent gross.
http://www.boxofficemojo.com/movies/?id=narnia2.htm
The movie cost 200 million to make, opened in over 3000 theaters and had no other huge opening with it. 56 million is not good at all.
Ironman made 140 million in it’s three day opening weekend. And that is not a kid friendly movie
Indiana Jones will kill Prince Caspian which is a shame. We need more like it.