Think Like an Engineer

Your team has a stack of paper and a little tape, and one job: build the tallest tower you can that stands up by itself. It has to hold steady for at least ten seconds with nobody touching it. Taller is better - but a tall tower that falls over does not count.

Anything tall has to solve the same problem your tower does: how to stay up without tipping over. Engineers who design tall structures spend most of their effort on the base and on balance, not the top.

• Skyscrapers
• |Cell and radio towers
• |Lookout towers
• |Construction cranes

Engineering design process

The steps engineers repeat to solve a problem: ask, imagine, plan, build, test, and improve.

Stability

How well something stays standing without tipping over. A wide, low base is more stable.

Prototype

A first version of a design that you build so you can test it and learn from it.

Redesign

Changing your design after a test to make it work better, instead of starting over.

• Paper
• Tape
• Scissors
• Ruler
• Coins or small weights

Engineers plan before they build. Work through these before you pick up any tape.

1. 1Draw your idea before you build it. A rough sketch is fine.
2. 2Label the strongest part of your design, and the part you are least sure about.
3. 3Predict what might fail first when you test it.
4. 4Decide which material goes where, and why that material fits that job.

These are guides, not rules. Two students can follow them and build very different designs - that is the point.

1. 1

   Start with the base. Decide how wide to make it - a wider base is harder to tip over.

2. 2

   Choose how to use your paper: rolled tubes, folded columns, flat strips, or a mix. There is no single right shape.

3. 3

   Build up in sections you can test, instead of the whole tower at once.

4. 4

   Use tape only where parts join. Too much tape near the top adds weight where you do not want it.

5. 5

   Stand it up as you go to check it is not leaning before you build higher.

A design is only finished when it passes a fair test. Run each test the same way every time.

• Height test

  Stand the finished tower on a flat table and measure from the table to the top.

  Measure: Height in centimeters

• Stand-alone test

  Let go completely and start counting.

  Measure: How many seconds it stands before tipping (goal: 10+)

• Wobble test

  Gently blow on the tower from an arm's length away.

  Measure: Does it sway and recover, or fall over?

Write down what happens each time you test. Your numbers tell you what to improve. Print this page or copy the table into your notebook.

Your first version is a prototype, not the final answer. Change one thing based on what failed, then test again.

• If it tipped over, widen the base or move more of the weight lower down.
• If it sagged or bent in the middle, add a fold or a support to stiffen that section.
• If the top drooped, use less paper up high so the tower is lighter where it is weakest.
• Change only one thing, then test again so you know what actually helped.

1. 1What made your tower stable or unstable?
2. 2What shape or base worked best?
3. 3What failed first?
4. 4What did you improve after testing?
5. 5How was your second design better than your first?

• Rebuild your tower to hold a single coin at the very top without falling.
• Try to beat your best height using one fewer sheet of paper.
• Design a tower that survives a gentle desk bump as well as a puff of air.

Running this lesson? The parent & teacher guide has setup, materials prep, safety notes, common failure points, and questions to ask.