His mom promised him a 3D printer if he goes to school for the rest of the year (He has a hard time in school, a combination of sensory overload and separation anxiety, but she teaches at the school now so that helps.)
I went ahead and ordered a monoprice mini select v2, because I've spent enough time with that model of printer to know it's strengths and limitations, and I think it'll be a good, minimally frustrating starting point for the kid.