Good afternoon. I have several years experience on photorealistic 3D and besides teaching your kid i will be opening another courses this year.
Blender is the best alternative to start, because its open sourced and very powerful. I would also suggest another sites and subjecta to study: python. I know where he can start free to study it and earn an honor certificatr.
Depending on his commitment i would gladly include him for free on the trial period. Hope to hear from you soon.
I would love to do this. Maybe a package would be better for You?
please get in touch to discuss this. Thank you for considering me.
Have a lovely day
Torsten