I didn't expect this but while making this list I realised that 2006 was a great year for animation. It brought us a huge amount of animated movies for both, kids and adults. Maybe this year didn't have The Movie but it had some iconic movies and also a lot of less known but still great movies and shorts.
Highest-grossing films of 2006: 1) Ice Age: The Meltdown 2) Cars 3) Happy Feet 4) Over the Hedge 5) Open Season
This list also contains some shorts. Movies are in no specific order. Some movies may be missing.