The Money World · Playground

The money sandbox.

Three tools for building money intuition. See compound interest in action. Split a fake paycheck three ways. Decide where $10 goes — and find out what it costs you long term.

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Tool One — compound interest, on a slider

Drag the sliders. Watch the number grow. The "eighth wonder of the world" only works if you give it time — this is the most important thing money does.

$1,000
$50
7%
20 yr
After all that
$0

Tool Two — split a $200 paycheck

You earned $200. How do you split it? Move the percentages. The bars show you where each dollar goes. Most adults never decide on purpose — you can.

$200 to split
Save%$60
Spend%$120
Give%$20
Try different percentages. There's no single right answer — but there are tradeoffs.

Tool Three — where did $10 go?

You have $10. Pick what to do with it. Then we'll show what that choice looks like over 30 years if you make it every week.

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