Feature●? HIDE THE SECRET MESSAGE YOU WRITE: Unlock the world of secret messaging with this spy pens for kids invisible ink. Write, wait, and reveal hidden messages with the built-in UV light. Perfect spy gear for kids.●? IDEAS TO INSPIRE: Unleash your creativity with our invisible ink pen set! Includes instruction manual and endless possibilities for games and fun activities.●? 4 COLOR SPY PENS: This invisible ink set comes with 12 pens and 4 color options: blue, pink, green, and yellow. Craft your mystery writing using a variety of colors. Kids love using this kind of pen to keep their secret and play detective spy games.●? COMPLETE SET: 12 invisible ink pens with uv light for kids with 4 color options, 2 spy notebooks for writing secret messages, and 5 stencils for secret invitations and coded messages. Perfect for birthday parties and creative designs. All in one set!●? PERFECT GIFT IDEA: Great gift idea for all ages, perfect for birthdays, Christmas, office colleagues, and party favors. Delivered in a fun package, perfect for aspiring secret agents.Description