There are quite a few nice things about this film. In particular, Zathura is an aesthetically intelligent film. The makers did a great job of not relying too heavily on CGI; very thoughtful design and effects. The convincing use of miniatures, real sets and chaos/destruction really brought the story to life. True, its a kids movie. But not so much that it annoys, there's a timeless and attractive notion of adventure. Really hearkens back to the glory of 80's kids adventure movies. The film's gadgets and knick-knacks were great. The house and Zathura game-board were both characters in and of themselves, every bit as important as the actors (who did a fine job).
Throughout I felt like I was watching a little of "Time Bandits" mixed with some "Goonies" and maybe some "Hitchikers Guide..." or "House".
Some folks seem ambivalent to the film. That's unfortunate. Up against a lot of the uninspired sh*t that is released these days, Zathura is very successful in creating a fun and visually convincing escape. Half way through the movie I realized that I was waiting/anticipating the film's failure, that it was going to let me down. Never did.
I appreciated the film.