AAcquired
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Innovation

The Fun Stack

Interrogate the words game, toy and fun until you have a real design target.

Difficulty
Easy
Time to result
~days to results
Steps
5
Confidence
68%

Vohra builds a definition by semantic interrogation rather than by citing academics. Start with the simplest claim: a game is something you play. Probe it with edge cases — a guitar, a friend, a piece of paper — and the grammar itself does the work: a game is something you play, a toy is an object you play with. Notice that some toys are more fun than others, and the definition sharpens again: a good toy is an object that is fun to play with. That forces the real question — what is fun? Test the candidate answer, pleasure, against its contrapositive: a relaxing head massage is pleasant but nobody calls it fun. The missing element is surprise. The stack terminates at a usable brief: fun is pleasant surprise, so design for pleasure and then engineer where the surprise lives.

Origin

Vohra credits Jesse Schell's The Art of Game Design for the base definition and builds the rest of the ladder himself. Extracted from Acquired.

Core principles

  • 01A game is something you play; a toy is an object you play with.
  • 02Some toys are more fun than others, so fun is the variable worth isolating.
  • 03Fun requires pleasure, but pleasure alone is not fun.
  • 04The missing ingredient is surprise, which our brains are wired to enjoy.
  • 05Definitions arrived at by interrogation beat definitions borrowed from a textbook.

How to run it

  1. 1

    Start with the plainest definition

    Write the simplest sentence that could define the thing, of the form 'X is something you Y'. Resist adding qualifiers.

    Pro tip If the definition sounds too obvious to be useful, you have started in the right place.

    Watch out Academic definitions with eight clauses stop the interrogation before it starts.

  2. 2

    Probe with edge cases

    Throw awkward examples at the definition — a musical instrument, a friend, a scrap of paper — and watch which ones it wrongly admits.

    Pro tip Pay attention to the preposition; grammar often marks the real category boundary.

  3. 3

    Split good from merely valid

    Once the category holds, ask what separates a good instance from a poor one. That gap is the quality you actually need to name.

  4. 4

    Test the candidate quality both ways

    Propose the quality, then check the reverse. Can you have fun without pleasure? Can you have pleasure without fun? A one-way relationship tells you something is missing.

    Pro tip The counterexample that survives is the clue: pleasant but not fun means an ingredient is absent.

    Watch out Stopping at the first plausible answer is how you end up designing for pleasure alone.

  5. 5

    Name the missing ingredient and use it as a brief

    State the finished stack in one line and treat it as a design instruction — here, fun is pleasant surprise, so every experience needs a designed place for surprise to live.

    Pro tip Hand the one-liner to the team as the acceptance test for new work.

In the wild

The head massage counterexample

Asked whether fun is simply pleasure, Vohra runs the test in both directions. Fun without pleasure is hard to construct — he cannot think of a case. But pleasure without fun is trivial: a relaxing head massage is deeply pleasant and nobody would call it fun. That asymmetry proves pleasure is necessary but incomplete, and points at surprise as the missing element.

→ A definition of fun as pleasant surprise, arrived at by counterexample rather than assertion.

Running the stack on a checkout flow

A team wants their checkout to feel good. Applying the stack, they find it is pleasant — fast, clean, no errors — but contains zero surprise, so it reads as competent and forgettable. They add one designed moment of pleasant surprise at confirmation rather than another round of visual polish.

→ A brief that points at a specific missing ingredient rather than a vague 'make it nicer'.

Common mistakes

Equating fun with pleasure

Plenty of experiences are pleasant and dull. Designing only for comfort produces software people tolerate rather than enjoy.

Outsourcing the definition

Picking a nine-clause academic definition off the shelf skips the interrogation, and it is the interrogation that produces the usable design target.

Is it for you?

Best for

Designers and founders who need a concrete, arguable definition of the experience quality they are chasing.

Not ideal for

Teams that need a measurable engineering metric today rather than a design target.

From the transcript

“A game is simply something that you play.”

“a game is something you play, a toy is an object you play with, but a good toy is an object that is fun to…”

“It turns out that fun needs surprise.”

From the episode

Special: Superhuman Part II - Designing Software to Feel like a Game (with Rahul Vohra)

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