Available From: August 2016 Your secret is safe with the Superhero Girls Electronic Secret diary. Use the magical pen to write down all your secrets and close the Diary to keep them safe; If you want to read the secret messages, open the diary up using the special electronic key fob and shine the key fob light onto the message to make it appear. Dont worry, no one else will be able to sneak a peek at your secrets, the diarys alarm will activate when anyone but you tries; Electronical diary and key fob opening system. Invisible ink pen and a key fob with ultraviolet light. Alarmed diary prevents intruders. Fun & engaging. Size H30, W38.5, D7cm. Batteries required: 3 x AAA (not included) plus (not included). For ages 3 years and over. WARNING(S): Not suitable for children under 3 years old. Only for domestic use.