We saw the IMAX version of "Charlie and the Chocolate Factory" with our two kids (9 and 4) and some friends -- a couple and their daughters, aged 7 and 4. Worth seeing in the theater, worth seeing in IMAX -- I wouldn't say that about too many films. Way better than the '70s version with Gene Wilder.
Favorite kid reaction: When Willie Wonka orders the Oompa-Loompas to roll Violet Beauregard to the juicing room after she has turned into a giant blueberry, my four-year-old called out, "Oh, man! I do not want to see this part!"