Learning coding

Hello all, I am looking for some opinions on how to best support the development of coding skills in a child who is interested. I'm not sure if this is the correct forum or should it be Luv-talk? He has built a Kano computer (Rasberry Pi based) and followed the programs it provides. As a next step I am looking at Code Academy which offers tutorials in about 6 languages. Could someone please offer a view as to where is best as a starting point, or is there perhaps a better route to follow? Does he start with web languages and then progress to Ruby or Python? All advice would be most welcome. Thanks Bob