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The Cafeteria Sandbox

Nudge people without banning anything

Rationality
100%
Budget
$500/500
Lunch line

Get healthy past 62%, ban nothing

Only two eye-level spots and junk is more tempting by default. Feature your best picks, bury the rest, then run the diners.

Arrange the line

Eye level 2/2

Only 2 spots at eye level, and junk is more tempting on its own. Feature your best healthy picks and push every junk item to the back. Nothing gets banned.

🥗

Garden Salad

Healthy

🍓

Fruit Cup

Healthy

💧

Water

Healthy

🍟

Fries

Junk

🥤

Soda

Junk

🍕

Pizza Slice

Junk

Healthy choice share

20%

baseline 20% · goal 62%

vs baseline

+0%

lift from baseline

What 0 diners chose

0/60
Why it works

Placement beats willpower

Choice Overload

Too many options and you pick nothing, or the worst one.

Give someone 500 options and they freeze. They give up or take whatever is labeled most popular, which is usually the one that pays best.

Default Bias

Whatever box is pre-checked is what you keep forever.

People stick with the option that is already picked, because changing it takes effort. Companies set that option to whatever pays them.

Anchoring Effect

The first price you see ruins every price after it.

The first number you see becomes the anchor you judge everything else by, even when that number is made up.