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Plastic Straw Skyscraper

Teams get a pile of plastic straws, a length of tape, and a shared deadline, then race to build the tallest structure that can stand on its own. It works because the moment gravity casts its vote, no amount of clever talk can save a bad connection.

30–60 min3–6 peopleAverageStraws & tapeIn-person onlyClassroom ✓
By Jon Zajac · Founder & Chief Icebreaker · Last updated February 19, 2024

What is Plastic Straw Skyscraper?

Plastic Straw Skyscraper puts a stash of straws and a roll of tape in front of small teams and asks for the tallest structure they can get standing on its own before the timer runs out. Teams of 3–6 plan, build, and defend every joint against gravity — the same problem an actual structural engineer works on, just with a much friendlier deadline.

It works because the feedback is immediate and physical: a straw tower that leans falls over on its own, with no judge required to call it, and every strip of shared tape becomes a decision about which joint actually needs the reinforcement. Teams end up talking through force distribution and balance out loud — real engineering thinking, smuggled into an icebreaker.

It's a hands-on build that needs table space, straws, and tape already on hand, so it leans in-person, not remote. Skip it for a group too small to field at least two teams — the whole point is comparing towers side by side, and there's nothing to compare with only one.

The rules

  1. The skyscraper must be freestanding — no leaning on furniture, walls, or the floor's fixtures.
  2. Build using only the straws and tape your team is given.
  3. Height and stability are the goals; shape and style are wide open.
  4. Scissors are optional, and stay supervised whenever they're out.
  5. Finish within the time limit — typically 20–30 minutes for the build itself.
  6. Height gets measured from base to top the moment time's called.

Before you start

  • Team size: 3–6 members. Divide the group into balanced teams within that range, and give each one a name or color for quick reference during judging.
  • A separate workstation per team. Pick a room with enough open space that no team's build ends up leaning into the next one's — a classroom, conference room, or open floor all work.
  • Equal materials for every team. Give each team the same straw count and the same length of tape; fairness here is what makes the final comparison mean anything.
  • A ruler or measuring tape, plus a timer. Keep both at the judging table — one to start and stop the build, one to settle the height question the moment it's over.
  • Decide on optional twists ahead of time. If you're adding an earthquake test, a height minimum, or swapping in other materials, announce the twist before building starts, not after.

How to run it

  1. Divide into teams and explain the rules 2–3 min

    Split the group into teams of 3–6 and assign each one a workstation. Lay out the goal, the rules, and the time limit before anyone touches a straw.

  2. Distribute materials 2–3 min

    Hand out an equal supply of straws and tape to each team, along with scissors if you're allowing them. Set a clear starting line so building begins on your mark, not before.

  3. Build against the clock 20–30 min

    Start the timer and let teams plan and construct. This window is a reasonable starting point for the build itself — adjust it based on how ambitious you want the towers to get.

  4. Stop, measure, and announce a winner 3–5 min

    Call time and measure every skyscraper from its base to its highest point, wherever it's standing. The tallest structure still freestanding wins.

  5. Debrief, with optional presentations first 5–15 min

    If there's time, let each team walk through its design choices and the challenges it hit. Either way, close with a short debrief on what the build taught them about structure and teamwork.

← gravity does the judging, not the ruler.

Facilitator tips

Offer straws in a range of sizesDifferent lengths and colors give people more ways to grip, cut, and connect — useful for anyone whose hands work differently than the rest of the room.
Pair the verbal rules with something visualA quick diagram of a stable base, shown while you explain, helps non-verbal and visually oriented builders as much as the spoken version does.
Build in extra time where it's neededA few extra minutes for a team working through a language barrier or an accessibility need costs you nothing and changes whether everyone gets to finish.
Keep the rules in plain languageSkip the jargon when you explain the challenge — a rule everyone actually understands beats one that sounds impressively technical.

Variations

Earthquake test

Once towers are measured, add a wind or earthquake test — a fan, a shake of the table — to see which ones were built to hold up, not just stand still.

Swap the materials

Trade straws for pipe cleaners, paper clips, or string to see how the same challenge changes with different building blocks.

Add build constraints

Require a height minimum, a specific shape, or another limitation, and watch teams find creative workarounds instead of just building bigger.

Why it works

A shared tape limit forces real trade-offsWith the same limited length of tape as every other team, builders learn fast that reinforcing the right two or three joints beats taping everything twice — the force-distribution lesson the rules promise, minus the lecture.
The freestanding rule reports the truth instantlyA tower that leans falls over on its own, with no judge needed to call it. Teams get direct, physical feedback on whether their plan actually worked.
Builds spatial reasoning through trial and errorArranging straws in three dimensions, then watching which arrangements hold, sharpens the same spatial thinking used in architecture and engineering — minus the stakes of a real blueprint.
HELLO, MY NAME ISJon

"I like that a stash of straws and one roll of tape teaches force distribution faster than any lecture could. The best part is how easy it is to reinvent — add an earthquake test, swap in pipe cleaners, and the same lesson takes a new shape."

Jon Zajac · Founder & Chief Icebreaker

Reflection questions

5 questions that turn a pile of leftover straws into an actual debrief.

  1. What strategies did you use to ensure your skyscraper was stable and able to support its own weight?Surfaces the force-distribution decisions that made the tower actually stand.
  2. How did your team collaborate during the building process? What challenges did you face in terms of communication or decision-making?Names which communication habits helped, and which slowed the build down.
  3. If given more time or resources, how would you modify your design to create an even taller or more innovative structure?Turns the constraints of this round into ideas for next time.
  4. What did you learn about teamwork and creativity from this activity? How can these insights be applied in other contexts, such as school or work?Connects the straw tower back to real teamwork, not just the game.
  5. How did you feel about the challenges or limitations imposed during the activity? Did they hinder or enhance your creativity?Gets at whether constraints helped or hurt — a useful read on how the group handles limits.

If this fits, so will these

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Tower of Cards

A deck of playing cards stacked into the tallest structure that can stand on its own.

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Newspaper Tower Challenge

Rolled newspaper turned into the tallest tower that can hold itself up.

Jon Zajac

Founder & Chief Icebreaker

I started IcebreakerSpot because I believe strong connections are the foundation of successful teams. This site exists to make it easy to find and share the icebreakers and team-building activities that build trust, spark collaboration, and help groups do great things together.

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