🕵️♂️ Write, Reveal, Repeat! Comes with two refills for endless secret messages. Lightweight design makes it easy to carry anywhere. Fun for kids and adults alike, ages 5 and up. Includes a UV torch for instant visibility. Write secrets that only you can reveal! 19cm length UV torch included Invisible ink pen The Tobar 9190 Secret Message Pen set includes a unique invisible ink pen, two refills, and an ultra-violet torch to reveal your hidden messages. Perfect for ages 5 and up, this compact and lightweight set is ideal for secret sharing and creative fun.