hello 
Don't know what level your son is at, so my suggestions will be rather general. Start with Linux and let your son get acquainted with bash. There are many great tutorials out there. Build a LAMP server from scratch, install wordpress and have him make a small website about his hobby or what-not. This way he gets his feet wet with using bash and CSS. I think that its a nice and pleasant first project
You can of course start with scratch and then fiddle with python. You didnt say how old your son is, so if he a young kid then go with scratch first.
Let me know if you found this useful and if you want me to trow more ideas at you Good luck!
Don't know what level your son is at, so my suggestions will be rather general. Start with Linux and let your son get acquainted with bash. There are many great tutorials out there. Build a LAMP server from scratch, install wordpress and have him make a small website about his hobby or what-not. This way he gets his feet wet with using bash and CSS. I think that its a nice and pleasant first project
You can of course start with scratch and then fiddle with python. You didnt say how old your son is, so if he a young kid then go with scratch first.
Let me know if you found this useful and if you want me to trow more ideas at you
Good luck!