“The Central Intelligence Agency, known informally as the Agency and historically as the Company, is a civilian foreign intelligence service of the federal government of the United States.”
Ref: https://en.wikipedia.org/wiki/Central_Intelligence_Agency
They have also setup a website for kids, to show under 18 the world of intelligence.
With stories and games, check out their website: Spy Kids – Central Intelligence Agency (cia.gov)
For those interested in the world of tradecraft / human intelligence (HUMIT). Check out their Glossary of Words. Ref: Spy Speak Glossary – CIA