By Entertainment Earth. Previously a San Diego Comic-Con 2018 Exclusive. In Harry Potter, Tom Riddle's diary was invisibly filled with Riddle's secrets and memories. Now, fill it with yours. Using the "magic" quill, write your inner thoughts and clever plans in invisible ink. Then view them only when you shine your wand's UV tip at the page to reveal what you've written. Set includes the Tom Riddle Diary Notebook, an invisible-ink pen, and a UV wand (requires 3 X 1.5V "AG3" (LR41) batteries (included). Keychain not included. Ages 8 and up.