I just put the same motherboard that you used if you don't mind, I noticed that you used the same CPU as me so I know it would fit because I don't feel like looking for another one.
God damnit... I didnt even notice that. I had to change a bunch of stuff around because I didn't even notice he wanted mini ITX form factor until the very end and I missed that.
If he is just playing Minecraft a good laptop will do (note that I say good). However, if he plans to get into some serious gaming in the future he will probably want a desktop.