Whether you’re raising a young Sherlock Holmes or a future James Bond, your little investigator needs the high-tech help of an invisible pen and UV light to reveal evidence and complete secret missions.

This pocket-sized pen is perfect for stealthy invisible message writing on the go. And the UV light illuminates other items that glow!

• Ages 8+.
• Requires 1 AAA battery (not included).

Thames & Kosmos was founded in 2001 by a science museum director and her son, who saw the great need and demand for better science education materials resources for parents and their children that are more engaging, more effective, more relevant, and more fun.