Mrs Warren went straight to Flynn's school to tell him the great news.
Flynn said at first he thought she was joking, but then she showed him the email on her phone. Flynn was so excited that he went straight to find his brother/training partner, to share the great news.
It's the fifth time a New Zealand All-Star team will attend this prestigious tournament in Branson, Missouri.
Flynn tried out at the United Airlines U13 Ripken National Championship and trials in Auckland where he made the tournament team and had the opportunity to have one-on-one time with the selector. Flynn's team, the Hutt Valley Hornets, won the national title.
This latest achievement is another step towards his future goal of getting accepted for a baseball scholarship in the US and playing in the major leagues.
It's not the first time the youngster has been selected to represent New Zealand.
Last year he was selected to attend the World Children's Baseball Fair in Yokohama, Japan.
Flynn has been swinging a bat since he was a year old after getting his first T-ball set and a baseball glove.
Although Flynn has played softball for most of his young life, his interest in baseball ignited after watching a live baseball match in Los Angeles during a family trip to the States.
Now with his eyes set on his next visit to the 'land of opportunity', he hopes to visit some of the national baseball stadiums where he plans to one day play.
Flynn and the team will travel at the end of July for the Ripken World Series which runs from August 3-10.
Levin Hustle Baseball Club president and Flynn's dad, Hendrix Warren, said Flynn is the first player in the club to be selected for the NZ Ripken All-Stars team; a great feat for a young player only in his second full year playing.
"The club established last year and in the space of two seasons has grown from one team with 13 registered players, to a club that has its development league with four teams, a travel team that plays in a U13 Wellington competition and has over 40 registered players," he said.
"Baseball is the fastest growing summer sport in NZ and holds a lot of sporting and educational opportunities for young people. New Zealand is on the verge of a team accepted into the Australian Baseball League.
"This means that we'll have a local professional team to follow and aspire to, much like the Warriors do for rugby league, Breakers for basketball and Phoenix for football; this will be a huge game changer for our sport," he said.
Mr Warren said he hopes that Flynn's success on the baseball field will transfer into more local athletes becoming interested in baseball.
"This is a great sport to be involved in, where locally, we focus on engaging with families, and ensuring the kids have fun and develop great skills on and off the baseball diamond."
