Sorry, i dont have time to read the whole thread. A quick search for "blender" revealed just one hit. Here is my unprofessional take. Use blender as a gateway

Sorry, i dont have time to read the whole thread. A quick search for "blender" revealed just one hit. Here is my unprofessional take. Use blender as a gateway for his visual ambitions. You can use his drawings as a background and sculpt something pretty from that blue print. Then get to animations, then the blender game engine, then python. Just as options ofc. Blender looks frightening at first, so you might to learn some before to overcome the first hurdles but there are also alot of kid friendly tutorials out there. Good luck :) Edit: Working with blender is actual fun and this graphical approach has also the advantage for nudging him very slowly into this monumental task :)