But this is really a silly movie for adults. The characters do really dumb things. The plot is transparent. Which is more than I can say about the ghosts. On the bright side, it's not the least bit scary, so the kiddies won't get nightmares. If your children must watch it, try not to groan aloud too much.
Better yet, if you want them to develop good taste, let them watch a better kid's movie. Like Harry Potter. Or make them read a book. Like Harry Potter.