June 9, 2022 · 2 min read

writing business

The Marshmallow Test Revisited

Too Long, Didn’t Read: Increase success by doing instead of planning.


Teams : Masters of Business Administration Students (MBAs) vs Kindergartners

Challenge : Build the highest tower with the given materials

Winner : Kindergartners (if they did not eat everything first!)

Why did MBAs lose to 6-year-olds? Dharmesh Shah, HubSpot's Co-Founder explained his success as:

"A combination of dreaming really big and iterating really small and having tight feedback loops" - Dharmesh, My First Million Podcast

He gave an example of this approach: The Marshmallow Challenge

Teams get a marshmallow, spaghetti, tape, string, and 18 minutes. Highest tower wins. Simple.

Why do MBA graduates perform poorly? What did they do in 18 minutes?

  1. Introductions

  2. Study the problem

  3. Assign everyone tasks

  4. Plan a structure design

  5. Build their structure carefully

  6. Start to run out of time and rush

  7. Place marshmallow as the build falls

Compare this to Team Kindergarten:

  1. Start building

  2. Pick up any fallen pieces

  3. Figure out what did not work

  4. Consider eating the marshmallow

  5. Repeat steps 1-4 until the timer rings

One team plans. The other team does.

Team Kindergarten had a tight feedback loop. They would start building. Then fail. Then build again. Do. Fail. Learn. Repeat.

10 minutes into the challenge- Team MBA have built zero towers. How many times do you think Team Kindergarten failed before Team MBA finished introductions?


Stop planning. Stop thinking. Start doing.

There is value in thinking ahead. But what if your plan stinks? Do not wait until the 17th minute to figure this out! Do. Fail. Learn. Repeat.

I have fallen into the trap. Constantly thinking. Constantly planning. But never doing.

For example, I have re-read Buffett’s letters multiple times. But did I get more value from reading the letters for the 6th time or from reading about a random industry?

There is value in listening to others. But that learning means nothing if I spend zero time applying it to businesses. Do not fall for the same trap that I did!

"The person that turns over the most rocks wins the game" - Peter Lynch

Anyways, back to rock flipping.

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Myles Marino

Partner at Third South Capital, where we cultivate, build, and buy software.

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