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Thames & Kosmos Spy Labs Inc: Invisible Ink Pen and UV Light Exchange To...
From: THAMES & KOSMOS

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Spy Labs Incorporated offers activity kits and equipment designed to introduce children to detective work through forensic analysis and tracking techniques. The high-tech pen features special ink that becomes visible only under UV light. A built-in UV flashlight on the opposite end allows users to read secret messages and collaborate with fellow agents. Suitable for ages 8 and up, the product encourages imaginative role-play as children take on detective scenarios. Spy Labs specializes in providing functional spy tools and gear for investigative play.

Online Review Summaries:
Things to Keep in Mind
The primary frustration reported is the pen's assembly, which requires a tiny screwdriver (not included) to install the ink cartridge and a AAA battery (also not included). Users frequently found the instructions unclear, and some felt the pen's plastic quality was low despite premium packaging.
Why You'll Like It
Children consistently find the invisible ink pen fun and engaging for creating secret messages, with its core function reported to work as expected.

ToyDirectory Product ID#: 53730      (added 7/8/2025)








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