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Builder's Lab / Week 04 / Friday
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Week 04 · Bridge the Gap

Friday

Test bridge version 2
// A paper bridge that holds the most coins
⏱ about 20 min

Friday: Test Bridge Version 2

Raven folds a new sheet back and forth, like a fan.

Rocket lays it across the same 6 inch gap.

Coin after coin goes on. Nova keeps count.

"Twenty! Twenty one!" Nova beeps.

At last, the bridge sags. Rocket cheers anyway.

VersionShapeCoins held
Rocket version 1Flat sheet2
Rocket version 2Fan folds21

Compare honestly

Version 2 held many more coins.

The gap, the paper and the coins stayed the same.

Only the shape changed, so the folds made the difference.

Your numbers may be different. That is okay!

READ THE RESULTS
  • Read the question.
  • Tap your answer.
Which bridge held more coins?
Why do we know the folds helped?
IdeaTrue or false?
Version 2 used a different gap.?
The fan folds made the paper stiffer.?
WHY THIS EXERCISEA fair test lets you trust what you learn.
Try it
Fold your bridge.
Test it on the same gap.
Count the coins.
Safety first
Keep coins away from babies and mouths.
Keep book stacks low.
VersionShapeCoins held
Your version 1
Your version 2

Why folds help

Each fold makes a ridge that stands up tall.

The ridges work together to hold the load.

They help the paper keep its shape.

COMPARE THE BRIDGES
  • Read the question.
  • Tap your answer.
How many coins did the fan fold bridge hold?
Was Raven's guess right?
Your folded bridge holds 15 coins, not 21. Is that okay?
OUR BRIDGE WEEK
  • Tap a card.
  • Then tap its spot.
1Monday
2Tuesday
3Wednesday
4Thursday
5Friday
ResultTrue or false?
The flat bridge held 2 coins.?
The folded bridge held fewer coins.?
The crew kept the gap the same.?
WHY THIS EXERCISEHonest results let us trust the fair test.

You made paper strong!

Tomorrow is Build Day.

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