Ok, not a review, just a recommendation to go see it. Kung Fu Panda was the best movie for kids I've seen, well, ever. Short (90 minutes), simple plot, always moving (no boring side plots), straightforward moral, straightforward humor, engaging for kids, and didn't leave me checking my watch every five minutes to see how soon I could get out of there.
Spencer and Garrett were on the edge of their seats the entire time, laughing, and thoroughly enjoyed it. They never lost interest, and didn't even finish their popcorn.
Very surprising for a Dreamworks film. Not even any inappropriate language.
Go see it.