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Treehouses make a great place for kids to hang out. They're located in the great outdoors, provide a high vantage point, and are naturally secluded — but just close enough to sneak into the kitchen for sandwiches and lemonade. They make good clubhouses, and "no babies allowed" is an easy enough rule for them to make when they're up so high. Rope ladder optional — otherwise just nail a ladder of boards to the trunk. For some reason this trope is prevalent in Western Animation
- The first issue of Phil Foglio's revival of Stanley And His Monster revolves around Stanley's attempts to build the world's best ever treehouse, following the instructions in a book of Fun Things For Boys he finds in the attic, without his parents finding out.
- In Crossing Midnight, Toshi jumping out of the treehouse that the twins loved playing in so much is how she discovers that she is Made of Iron.
- George and Harold of Captain Underpants drew comics in the treehouse.
- The Magic Treehouse series have two kids, Jack and Annie that go into their magic treehouse and are transported through time.
- Rush Melendy builds himself one in Elizabeth Enright's The Four-Story Mistake and it's also in Then There Were Five.
- In Doris Fein's Andrew Henry's Meadow, Andrew Henry builds one for a friend, though not for himself.
- The live action The Brady Bunch briefly had a treehouse too, just long enough for Bobby to sprain his ankle climbing up, developing a fear of heights.
- Barney & Friends, B.J. and Baby Bob are playing in it a lot, and a whole movie took place in the treehouse.
- Cory moves into his treehouse in the pilot of Boy Meets World because his brother betrays him and his parents take his brother's side.
- In Calvin And Hobbes, Calvin and Hobbes are in the treehouse a lot. Hobbes gets a lot of mileage out of the fact he's the only one who can climb up without the rope ladder being down, and can force Calvin to do ridiculous, flattering, and humiliating things to access the ladder.
- A Peanuts Sunday strip had Linus startled by a falling plank of wood. He stops and watches as more planks, tools, and eventually Charlie Brown crash down from above, then consoles him on how hard it is to build a treehouse.
- Toon has a setting called "Toony Tykes Adventures" for fans of stuff like Calvin and Hobbes, Little Lulu and the like. One of the scenarios features the "Treehouse of Doom", a super-awesome treehouse designed with input from actual kids.
- Click Clock Wood in Banjo-Kazooie features a treehouse in different stages of completion, throughout the various versions of the world. If you go in it once it's finished, you can find a Jiggy.
- The Hub Level/menu screen for the first world of A Boy and His Blob (Wii) is a treehouse. A really epic treehouse, with three stories as well as a lookout.
- Subverted by Cosmic Osmo. In the middle of a universe of fun, the treehouse is "a place of relaxation" with nothing but a hot beverage dispenser and some teacups on a picnic table.
- One of the earlier Edutainment computer games had a treehouse. There was a chalkboard you could draw on, and a telescope you could look through, a few links to mini-games and some 'just for fun' clicky-things. It was neat, for the time, but you tended to run through the limits of what you could do really quickly.
- Limbo has lots of treehouses. How fun they are, are left up to player's imagination.
- The kids who live in them seem to be having fun, at least.
- The PC game The Treehouse is all about this.
- The duo of Suicide for Hire runs their questionable business out of their old treehouse. The "fun" part is for them, as the door for customers is lined with booby traps.
- Hey Arnold! has Mighty Pete, a tree that Helga's father Big Bob wanted to tear down to put a Big Bob's Beepers chain in its place, but in the end, the kids and Arnold's grandma saved the tree.
- One episode of South Park had the kids building a treehouse to play Truth or Dare in. Randy and Sharon both remembering playing in a treehouse is part of the subplot.
- In The Simpsons, Bart Simpson had a Treehouse of Fun, which occasionally turned into a Treehouse of Horror.
- The Fairly Odd Parents: Timmy Turner had a treehouse.
- The title characters of Phineas And Ferb rebuilt their and Candace's treehouses in "Tree to Get Ready", with an additional feature to transform into battling robots.
- The kids of Arthur often are seen in their treehouse, or a "clubhouse".
- Codename: Kids Next Door has a huge, sky-scraping monstrosity of a treehouse as not only a clubhouse, but a secret headquarters, one of many across the globe. The KND even have a tree house on the Moon; after it gets lost to a Colony Drop in The Movie, they build a BIGGER one.
- The Brady Kids in the Band Toon of The Brady Bunch were often seen in their treehouse.
- The treehouse from Adventure Time has got to take the cake: it's Finn and Jake's actual home, built into a hollowed-out tree with numerous rooms connected by ladders. Also, it was apparently built by a vampire.
- Here's◊ a breakdown of the treehouse.
- In My Little Pony: Friendship Is Magic, Twilight Sparkle lives in an apartment at Ponyville's Golden Oaks Library, which is built into a large tree. Also, in "The Show Stoppers", Applejack lets Apple Bloom and her friends use her old tree-house as a clubhouse for the Cutie Mark Crusaders. It's a mess when they first find it, but Apple Bloom manages to fix it up.
- This event is why most people agree her talent is carpentry or craftsmanship.
Applejack: It's a bit broken down, but all it needs is a little TLC!
Scootaloo: Tender Loving Care or Totally Lost Cause?
- The treehouse in My Pet Monster had a surprise slide staircase.
- T.J. owns one in Recess.