Ludovic Piraud’s Adventure Time figures grew stronger with community feedback
The fan behind LEGO Ideas 21308 turned a cartoon’s rounded characters into blocks—and invited other builders into the process.

A fan project with room for other builders
Ludovic Piraud did not describe himself as a prolific LEGO builder in the Adventure Time set booklet. He called himself an occasional builder and credited other LEGO Ideas users with constructive feedback that helped his final project update.
That makes 21308 an especially welcoming community story to revisit. Its origin was a fan’s enthusiasm for a colorful cartoon universe, accompanied by a willingness to let other people help improve the translation into bricks. The booklet is the source for this retrospective; we have not conducted a new interview.
Recognizable does not have to mean perfectly round
Piraud explained that Adventure Time’s rounded character designs initially seemed an awkward match for LEGO bricks. He chose to work with block-like forms, relying on color and proportions to preserve recognition.
LEGO designer Adrian Florea then had a different practical task. The submitted digital model used some elements that were no longer available, and the final design needed workable combinations of parts and colors. That production work sits behind the apparently simple finished figures.
Eight characters create a small company of performers
The official product record lists Finn, Jake, Princess Bubblegum, Lady Rainicorn, Marceline, BMO, Ice King and Gunter. Several have movable arms, and the accessories include Finn’s sword, Marceline’s axe-bass and BMO’s joysticks. LEGO now labels the set retired.
Looking at the product image, the variety is its attraction: a long rainbow body, a compact green box, tall pink clothing and a small black-and-white penguin all occupy the same display. Our visual assessment is that a shared block construction style holds the group together while the different proportions keep each character legible.
The value of showing a work in progress
LEGO’s December 26, 2016 launch post traces the project back to February 2015 under Piraud’s aBetterMonkey name. What began as a personal challenge reached the 10,000-supporter milestone and became an official set.
For today’s fan builders, the encouraging part is not a promise that sharing a model will lead to a product. It is the smaller, usable idea of asking a focused question while a project can still change. Does the face read clearly? Is the body too tall? Which color matters most?
Specific questions give other builders something useful to respond to. Piraud’s account offers a cheerful example of a project gaining strength because its creator made room for that conversation.
Reporting checked October 24, 2026. Plans and programs can change; follow the linked organizations for current information.
