The Bletchley Park Trust is restoring the site near Milton Keynes and expects to get 250,000 visitors a year.
Software firm McAfee will be a partner in providing an IT learning zone and cyber security exhibition.
The trust said it hoped the attractions would inspire the 16,000 children it expected to attend each year.
Bletchley Park was the highly-secretive site where teams, including the "father of computing" Alan Turing, broke the German Enigma codes.
The trust is aiming to re-open the site in time for the 70th anniversary of the World War II D-Day invasion of France, next June.
The learning zone and security exhibition will be built in a derelict block on the estate.
we say - brilliant idea:)