[phn]

Have you introduced him to tools like game maker, construct, stencyl, etc. ? Maybe he can do some simple things and then learn some code...

[nitrogen]

I second this idea. The old Klik-n-Play program contributed to my inspiration when I was a kid, and the license agreement forbidding distribution of my creations helped motivate me to continue to learn to code. My next step after Klik-n-Play and QuickBasic was Allegro and DJGPP.