It uses a smaller ball and pitch than standard rugby, and has eight to ten players a side.
There were no line-outs and no pushing in the scrum, which was made up of a prop, a hooker, a lock and a flanker.
The rule changes based on the rugby continuum are designed to make the game both safe and enjoyable for the level of physical and intellectual development expected in any given age group.
And with tagging, it helps reduce the risk of early injuries and health related issues.
The game is simplified for the younger generations to understand the concept of consistently running and passing.
U9 and U10 rugby is played with tackling instead of tagging and the game becomes more physical as age increases.
[2] England: Well-known English players who came up through the mini rugby system include Jeremy Guscott and Ben Clarke.
[1] United States: Well-known players from the United States include Garrett Bender, Andrew Durutalo, Zack Test, Chris Wyles, Ben Pinkelman, Madison Hughes.