This Monster High-themed Password Journal features exclusive Monster High sounds, locks automatically when closed and stays locked until the secret password is heard. Theres also a second password for the secret compartment, where the really important stuff can be stored. Plus, girls can write in the themed journal with the Invisible Ink Pen, then watch their words magically appear by activating the Show/Glow light-and they can do it all while listening to their favourite music on their MP3 players! Its the perfect journal for a cool and connected Monster High ghoul. Requires 3 AA batteries (not included).