Every girl's secrets are safe with this journal! Its sleek design features a cup that locks automatically when closed and stays locked until the secret password is said. There's also a second password for the secret compartment, where the really important stuff can be stored. Plus, girls can write in the 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 favorite music on their MP3 players! It's the perfect journal for a cool and connected Girl Tech girl. The Girl Tech Password Journal Electronic Diary Journal measures about 8-inches tall and requires 3x "AA" batteries, not included. Ages 6 and up.