It may be alright for a first upper for a kid, But I do not have alot of confidence in it for the long run. I do not think it would be something he could pass on to his kid.
I would get him the SW MP22 before that ATI. But I did neither for my kids. I just went with a good quality upper from the likes of CMMG from the start. I studied the SW MP22 and these cheaper ones and decided against them. Our two dedicated CMMG uppers are in for the long haul. Just alot better quality than the cheaper stuff in my opinion.
Both our CMMGs run 100% flawless on any ammo we run through them.
The SW is a fine little rifle from what I have read. But I did not like the plastic, nor the proprietary design of them. Wanted a upper that duplicated the Big Brother faithfully.
You do not want the kid getting discouraged with a a Firearm. I think eventually and likely from the get go, that is what he will get from the ATI. Maybe I am wrong. But I just do not think that ATI will have long term durability. And likely no parts or customer support in the long run either. It may have problems right out of the box likely. You may get one that works. You may not.
Just my two cents worth. Take it for what it is worth to you.