In the shadowy world of spies, some of the coolest gadgets aren't just from
movies; they are real tools used in secret missions! Spies have been using
amazing technology for years to gather information and stay undercover.
Take the spy pen, for example. It looks like any other pen you might use in
school, but it has a secret camera inside. Real spies have used pens like this
to take photos of important documents, and nobody around them is any
wiser!
What is a spy pen used for?