This was a fascinating classroom lesson. These small children reacted so quickly to being divided by such a small distinction. I'm a little surprised they didn't rebel and play with their friends anyway.
I would love to see a followup with them when they're older.
Allegra take a look at the video that was longer, it shows their reactions when they returned for a class reunion. I also found it curious that the students didn't rebel but at the age of a third grade student, the teacher had control and was able to manipulate their thought processes. It might not have worked if they were much older.
That's true that they're young. I think I just wished they would rebel somehow.