The Early Bird Saver: why starting young beats saving more

Two savers put in exactly the same amount. One starts early and stops, one starts late. A 20-minute pen-and-paper race that shows children aged 9–11 how interest earns interest.

👦 Ages 9–11
⏱️ 20 minutes
✏️ Paper and pen
🆓 Nothing to buy or print

Tell a ten-year-old that starting to save early matters more than saving a lot, and they’ll nod politely without believing a word. It sounds backwards. So let them race two savers on paper and find out for themselves.

What you need
A sheet of paper and a pen. Draw two columns headed Early Bird and Late Starter, with rows numbered 1 to 10 down the side. A calculator is fine if the sums start to drag.

How it works

  1. Set the rule. Each round, a saver can put 5 coins in their pot. At the end of every round the bank adds 1 coin for every whole 5 in the pot. Each round stands for a few years.
  2. Meet the savers. Early Bird saves 5 a round in rounds 1 to 5, then stops and never adds another coin. Late Starter saves nothing in rounds 1 to 5, then 5 a round in rounds 6 to 10.
  3. Ask for a prediction. They both put in exactly 25 coins. Who ends up with more? Write the guess down.
  4. Work through the rounds. Your child does the sums. As a check, Early Bird should have 43 after round 5 — and Late Starter still has nothing.
  5. Keep going to round 10. Early Bird isn’t saving any more, but the bank keeps adding. Late Starter is saving hard and catching up slowly.
  6. Compare the pots. Early Bird finishes with 104 coins, Late Starter with 43, from the same 25 each. Ask: where did Early Bird’s extra coins come from?
What they’re learning

Interest is paid on the interest you’ve already earned, not just on what you put in. So money saved early keeps growing long after you stop — which is why starting young can matter more than saving a lot.

What usually happens

Most children predict a draw, or back the Late Starter for trying harder at the end. Rounds 6 to 10 are where it lands: the Early Bird’s pot grows by more each round while the Early Bird does nothing at all.

It’s worth being honest that the game speeds things up. Real savings accounts pay far less than 1 in every 5, so the same effect takes decades rather than rounds. That’s the reason grown-ups are told to start a pension young — and a good moment to mention it.

Make it easier

You do the sums and your child keeps the tally, calling out each new total. Just follow Early Bird for all ten rounds and point out the rounds where they saved nothing.

Make it harder

Add a third saver who puts in 5 every round, all ten of them. They finish with 147, which is exactly Early Bird and Late Starter added together. Ask them to work out why.

Why starting early matters more than saving a lot, and what a pension really is, is lesson 7 of the ten-lesson Smartmonies programme. See the ten lessons →

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