If you have young kids this is one you want to go see. Horton Hears a Who! is a Dr. Seuss classic brought to the big screen with Jim Carrey as the voice of Horton and Steve Carell as the mayor of Whoville. The annimation in this film is fantastic. The creators of Ice Age were involved and if you have seen that, then you know what you will be seeing.
There are a few parts that might get a 2 year old covering their eyes, but for the most part it's a fun movie and keeps the interest of the kids from the start to the end. I certainly would say it's enjoyable for adults as well.
So this weekend if it's raining, find yourself a good theater to go and see this movie.