The approach taken by Charles Petzold in his book "Code" is definitely accessible, though kids don't really need Morse code and flashlights any more when they a

The approach taken by Charles Petzold in his book "Code" is definitely accessible, though kids don't really need Morse code and flashlights any more when they all have iphones... https://codehiddenlanguage.com/ https://codehiddenlanguage.com/