What's your hypothesis

A question that gets asked all the time on forums and boards is "If you could create an experiment without any moral consequences what would it be?" Here's mine:

This experiment proves that race and racism isn't an inherent thing

The experiment would require a group of around 500 children. The children have had interactions with just robots who speak to them, teach them some stuff like eating, bathing, using the bathroom, that sort of stuff. After about 6-7 years of this these kids go out into a city sized area with rundown houses with shelter, food, plumbing, etc. No other outside humans would be in the area.

The catch is that there's several different races and ethnicities, including Black, White, Brown, etc. For the record they all speak the same language.

My hypothesis is that when the different races interact with each other, they would get along just fine. I feel like they would all have the same goal of survival, shelter, filling up their bellies, maybe reproducing (but that's a whole different conversation).

I always felt like racism has to come from the inability for people to communicate with each other, I would actually go out on limb and say that if we tough different kids different languages, the white kids who speak English are MUCH more likely to form a clade with the black and brown kids that speak English than they would ever be with the white kids who spoke Italian.

What's your hypothesis about how this experiment would play out?