Hey, I learned C the "real programmer's" way, from K&R version 1 ... but that was more than 20 years ago, and things have moved on :-)

Something I came across recently is Phrogram http://phrogram.com/. It was formerly known as KPL -- Kid's Programming Languague. It's Windows-only and it's not Free (Libre) but the "express" version is free. The premise of Phrogram is that what got many of us into coding all those years ago was stuff like BASIC on the Apple/Commodore/Atari/BBC/whatever that let you do "coo stuff" easily. Of course, the definition of "cool stuff" has moved on so Phrogram aims to make it easy to do stuff like 2D and 3D game development easily (there's a great demo of flying a 3D spaceship in 30 lines of code).

I've got no affiliation with Phrogram -- but if you want to get kids hooked on coding, it may be worth a look