Parents need to know that this movie is scarier than the first in the series and characters spend a lot of time in extreme peril. There are frightening creatures, including lots of big spiders and an enormous snake that can kill anyone who looks in its eyes. Though it appears that some characters have been hurt or killed, all the good guys are ultimately fine. Children who are not familiar with the story, however, may be upset. There are also some gross moments when Ron's spell backfires and he spits up slugs, and when another misapplied spell leaves Harry without any bones in his forearm. Friendship, love, bravery, and loyalty are always major themes in the series. So is the idea of making good choices.