Trope Workshop:Mature Kid, Immature Adult

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A Kid or a younger character who acts like a responsible, independent, set up the rules, and/or show signs of a mature behavior. An Adult or an older character who acts like an emotional, carefree, wild imaginations in their heads and/or show signs of an immature behavior.

See Man Child, Not Allowed to Grow Up, and Not Allowed to Grow Old.

Examples of Mature Kid, Immature Adult include:

Live-Action TV

• Logical Extreme with Supernannyinvolves children ruling roost and parents either shout or wouldn't control the house properly and ended up being dependent on their kids, perhaps the show in the US and UK can easily be "Mature Kids, Immature Adults: The Series" for obvious reasons.

Video Games

• Sonic the Hedgehog: Amy Rose and Cream the Rabbit played straight with this trope.
  • Amy Rose is emotional, clinging, and carefree like a 5-year-old girl.
  • Cream the Rabbit is wise, shy, and mature like an old lady.
  • Since the release of Sonic Colors in 2010 and Onwards, Sonic seems to act a bit childish and make jokes of Dr. Eggman, while Tails seems to acts like an older adult who knows everything and he also sounds older than his actual age.
• The more newer Crash Bandicoot titles from 2005 to the present has Crash, Crunch, and Cortex being emotional like a child while Coco and Nina being mature and responsible for anything like an adult despite of Coco is Crash's younger sister and being a kid from the 90s to early 2000s.

Web Animation

• The Majority of GoAnimate/Vyond videos that are mostly focused on grounded kids, teens, most hated characters, or fictional villains are one of the well known examples of Maturity Reversal.
  • Sometimes the grounded characters stole their job and make strict rules while sometimes parents tend to throw huge tantrums saying "You're Grounded", Some episodes invoked the grounded kids throws a tantrum and destroys school, restaurants, and more as invoked that they wanted things right now or they wouldn't handle things they have nothing to do but breaking the scenes like a super villain.
  • Most notable grounded characters as Dora the Explorer and Caillou.
• Happy Tree Friends has most of the smaller characters like Sniffles, Cuddles, Toothy, Giggles, and Petunia acting independent while Lumpy acts like a toddler sometimes and Pop is somewhat emotional like a kid whenever his son Cub was either killed or playing with things that aren't safe.

Western Animation

• Most Notable in Ed Edd n Eddy with Ed and Sarah respectively.
  • Ed is a Carefree, emotional, and has extreme wild imaginations like a child younger than his age (12 years old).
  • Sarah is bossy, controls the house, and disciplined like a parent rather than her actual parents as Justified that the parents don't actually appear.
• The Simpsons Shorts Lampshades in the episode "Bart's Little Fantasy" Bart's story that Bart, Lisa, and Maggie took over as parents while Homer and marge took over as children in size reversal that the children are large and the parents are small.
  • Played Straight with Homer who acts like a carefree child while Lisa who acts like a teacher or a college student.
• Adverted with SpongeBob SquarePants has SpongeBob himself acting mature and responsible in the early seasons while Patrick acts like a child. Meanwhile in the late 2000s to early 2010s, SpongeBob became emotional while Patrick acts like a strict mean bully.

Real Life

• Adults tend to watch or play video games that are aimed at kids while children tend to watch or play video games that are aimed at adults.
• During mostly the 2010s, the 90s kids tend to dwell on the past leading to some videos which the majority of the ranters younger than the 90s kids nostalgia goggles who are mature and understand radical acceptance.
• Inverted with the Equality Rights that people from the Middle Ages and earlier tends to believe everything inequality and myths, most likely from their imaginational thoughts while people now days tend to accept people who are different and debunked them.