How old is the kid anyway ? Because running a working CNC machine is require more skill than he expected. Does he have any idea how heavy that machine is ?
Well, If he is in high school, he can start with wooden model and probably help when he grow up but make sure don't get caught by nanny soccer teacher, otherwise he is screw for manufacture baby killing machine, that's jail time man. lol.
No, It wasn't a good idea.