Maybe heads, maybe tails!

Welcome to the Maybe-Coin Lab!

Can something be two possibilities until you observe it?

Let's investigate!

Predict and observeGuess the result, then look and find out.

Flip it 100 timesWatch a pattern grow out of random flips.

Think like a scientistRead the evidence and explain what you found.

PredictObserve

Explore the maybe state

Before you look, the Maybe-Coin shows both possibilities. Predict what you'll see, then observe.

Two possibilities. One observation.

1. What do you predict?

2. Now observe the coin

Observations: 0. Correct predictions: 0.

Is a real coin really heads and tails at once?

No. A real coin always has one side facing up, even when it's hidden under your hand. We just don't know which side until we look.

The Maybe-Coin is a pretend model. It helps you imagine a real idea from the quantum world: tiny things like electrons and particles of light can be in a mix of possibilities until they're measured. Scientists call this superposition.

PredictExperiment

The 100-Flips Challenge

One flip is a surprise. What happens after 100?

Predict first: how many heads in 100 flips?

Predicted number of heads out of 100 50

Ready to flip

Super-fast mode

0Heads

0Tails

0Total flips

0%Heads %

0%Tails %

Challenge progress0 of 100 flips

Flips 1–100

HeadsTails

Analyse

Probability Observatory

Your results, live. The gold dashed line shows a perfect 50/50 split.

Heads vs tails

0%heads

HeadsTails50% mark

How many of each?

0

HeadsTails

Expected 50/50

Percentage check

Heads 0% and tails 0%

Distance from an even split

–

percentage points away from 50%

Heads % after every flip

Watch it settle

Snapshots

After	Heads	Heads %	From 50%

Run some flips and your discoveries will appear here.

Reflect

Think like a scientist

Answer from your evidence. The feedback checks your own results.

What's a question you still wonder about?

Real scientists finish an experiment with new questions. This stays on your screen only.

Discover

What did we discover?

Tap each card to reveal a big idea.

A real coin vs a quantum particle

Question	A real coin	A quantum particle
Before you look	It's already heads or tails. The answer is just hidden from you.	It can be in a mix of possibilities at once. This is superposition.
When you measure	You find out the side that was there all along.	You get one definite result, and the mix is gone.
Can you predict one result?	No, but the chance of heads is 50%.	No, but scientists can work out the chances.

Scientists don't always know what will happen next. But they can investigate, observe patterns and discover how the world works!