Floo Powder is the first level in The Chamber of Secrets in Lego Harry Potter: Years 1-4.
- Playable characters: Harry Potter, Ron Weasley, Ginny Weasley, Hagrid
- Main locations: The Burrow; Borgin and Burkes; Knockturn Alley
- Unlockable Characters: George Weasley, Arthur Weasley, Harry (Sweater)