This is lovely!! A great gift!!!
You want your grandson to experience what is making a game looks like?
ohhh this is totally fantasssstic! I can guide your grandson, REMOTELY only....
I can show him, part of the processes, talk to him about WHY he should do game design, try to inspire him, and most importantly, showing him, that he can do money making GOOD games alright, we want a GREAT game designer here, someone who is impossible to ignore because he's too good!
I've been playing games since I was 5, now Im 32 and I lead my own small team, and remote indie development studio.
I would start asking what games does he likes to play? (we want to start THERE)
Let's get in touch!
:)