Interest on interest
Explore why the snowball analogy captures compound interest perfectly: the bigger it gets, the faster it grows.
In this lesson
Interest on interest is part of Compound Interest Intro. This preview shows how interest-growth connects to everyday family decisions such as earning, saving, spending choices, goals, approvals, or parent-guided money conversations inside Progress Penguin.
Think about this money choice
Imagine this situation: Year 1: 10000 in local currency earns 10% = 1000 in local currency interest, new balance 11000 in local currency. Year 2: interest is calculated on 11000 in local currency.
How it works
The snowball analogy captures compound interest perfectly: the bigger it gets, the faster it grows. The same percentage applied to a larger base produces an increasingly larger absolute amount each period.
Apply it to a real decision
Real-life money moment: 10000 in local currency compounded at 10% annually. Fill in: Year 1 balance =? Year 3 balance =?
Activity preview
Choose the best money move
Use what you just learned. Choose the option you can explain.
Build your own savings goal
Progress Penguin will guide you through the goal name, target amount, and deadline. When you finish, you will return to this exact lesson step.
Quiz preview
After many years, compound vs simple becomes:
Year 1: 10000 in local currency earns 10% = 1000 in local currency interest, new balance 11000 in local currency. Year 2: interest is calculated on 11000 in local currency. How much interest in Year 2?