192 RULED PAGES: Whether you aspire to be the next great paleontologist, need a place to record your own discoveries, or want a private place to keep your personal thoughts and secrets secure, this lock and key diary provides you plenty of space for your writing needs. FIND DINOS HIDDEN WITH INVISIBLE INK!: Find eight different dinosaurs like T-Rex, Stegosaurus, and Ankylosaurus hidden throughout the pages of the diary in invisible ink. As you use the diary, keep an eye out for the dinosaur sighting mark! MAGIC PEN INCLUDED: Use the included magic UV light pen to reveal these amazing dinosaurs, their tracks, and more! LEARN DINO FACTS: An educational dinosaur sighting map of where these dinosaurs appeared in the United States is also included.