6000 years ago. 5000 years ago. Tepee rings, cooking pits. Sophisticated housing and food processing technology. 4000 years ago.
New peoples arrive with new ceremonies.
3000-2000 years ago. Trade contacts all across the continent. 500 years ago. A big ceremony where gifts are given to family and guests to show the status of the family and support for the boy. Modern day, Blackfoot Tepee.