I think there are some profound lessons here for the way we teach and learn to play chess. What’s not mentioned in this article is that the kids only get to play with a ball after three months!
What should be the chess version of this? Well kids probably shouldn’t start with a full set of pieces as this can get confusing for beginners. And they should focus on learning to play a good game of chess rather than put the focus too heavily on short term competitive success against other kids that can hardly play.