Elsa
Elsa's cultural longevity presents an intriguing case study in franchise sustainability. Disney's strategic patience proved remarkably effective, with six years separating Frozen and Frozen II, during which merchandise sales maintained robust momentum. However, the character remains fundamentally dependent upon Disney's continued investment. Children's attention spans evolve with merciless efficiency; today's devoted Elsa enthusiast becomes tomorrow's indifferent teenager. The character's relevance requires periodic cinematic reinforcement, a strategy that cannot continue indefinitely without risking franchise fatigue.
Lego
Individual Lego bricks manufactured in 1958 remain perfectly compatible with those produced today, a testament to engineering consistency bordering on the obsessive. The company estimates bricks can withstand 37,112 connections before structural failure occurs. More significantly, Lego has demonstrated remarkable adaptability, surviving video games, digital entertainment, and multiple predicted obsolescence events. The system's fundamental appeal transcends generational shifts because building things addresses a primordial human urge that no technology has successfully supplanted.