【New, Unused】 Glitter Secret Pens Set of 2: White and Blue. Write secret messages with invisible ink, and the words magically appear when illuminated by the black light on the cap! ● Size: Approximately 133 x 17 x 16mm ● Recommended Age: 6 years and older ● Includes 3 test button batteries (LR1130) Will be wrapped in bubble wrap and shipped anonymously.