I think you're getting Little League and Vickick confused. What you've described in SA, actual matches played between two different teams, is not Vickick, which was about skills development and not playing games against others.And VFL copied its format from SA's Modified Rules written on the back of a cigarette pack in 1968 by Don Roach who was the SANFL's first full time promotions officer appointed after the 1967 season finished.
Roach played 158 games for West Adelaide and was the team’s captain and coach in 1966 and 1967, he played 42 games for Norwood, 33 games for Hawthorn and 9 for SA and was selected in the All Oz team at the 1961 carnival.
He introduced the Coca-Cola Mini League as one of his first junior football innovations, played at half time of SANFL games and played under the Modified Rules. It was played by grade 5 and 6 boys so 10 or 11 year olds.
He was SANFL's GM/CEO for 10 years and then Sydney Swans recruited him at end of 1984 to be their CEO. He was sacked after a couple of years, but stayed involved in footy in Sydney and NSW, became chairman of the AFL NSW/ACT Commission and this memoriam piece was written by AFL NSW/ACT when he died in 2011.
This was the first and the start to Australia’s and possibly the world’s adoption of modified versions of open age sporting games particularly for young children. It is a legacy that Don Roach will be remembered for in the years ahead.
This Footy Almanac article is about Don but in between the info about his career at the start and end of the article, it also has a lot of great pictures from the book he wrote when he was that promotions officer in 1969, titled - How to play Football.