Props, then, to the people behind the “Harry Potter and the Half-Blood Prince” for coming up with a slew of extras that will be fun for the kids and give their parents something to chew on as well. Matthew Lewis (Neville Longbottom) and Alfie Enouch (Dean Thomas) host a series of clips where the child actors meet with various behind-the-scenes personnel, discussing editing, makeup, costumes, special effects, and even owl training. Tom Felton (Draco Malfoy), meanwhile, plays a fun game called “What’s on Your Mind?” with the cast, asking questions about their favorite food, people and places. It’s completely fluffy and light, but fun.

There are several deleted scenes, including one involving clouds gathering over Hogwarts that should have made the final cut. On the self-promotion front, there is a featurette dedicated to the opening of The Wizarding World of Harry Potter at Universal Islands of Adventure in Orlando. The biggest surprise, though, is the 50-minute film (!) “J.K. Rowling: A Year in the Life,” a rather sobering documentary about her upbringing and the parallels between her life and the Potter universe. Good stuff, Warners.