The article from Yahoo Lifestyle discusses the optimal number of Lego sets needed to build a strong relationship with a child, emphasizing quality time over quantity. It suggests that having just a few Lego sets can be sufficient, as the focus should be on the interaction and creativity shared during the building process rather than amassing a large collection. The piece highlights that engaging in Lego building can foster communication, problem-solving skills, and bonding, with the key being the time spent together rather than the number of sets owned.