Comment by tsumnia

To me, this doesn't sound so surprising - Sweller's Cognitive Load Theory theorizes that we have an unlimited memory capacity. I think the primary issue comes from time and practice. With a child, even when they don't "want to", they're forced to practice by parents and adults. With adults, however, if we don't want to do something, we don't and others are frowned upon if we insist they do it anyway.