The rainbow marble stops just before the finish line. Four friends have to work out why.
10 illustrated pages · About 6 minutesRead together
Rainbow Marble Day · Page 2 of 10
The Marble Stops · Page 3 of 10
Start Higher · Page 4 of 10
Add a Jump · Page 5 of 10
The Hard Moment · Page 6 of 10
Finding the Bump · Page 7 of 10
Just This One · Page 8 of 10
Pressed Flat · Page 9 of 10
Ding! The Bell Rings · Page 10 of 10
Three ideas the friends meet on the track. Each one is named in the story text below.
A marble only starts moving when the track is higher at one end — and a taller start makes it go faster.
Panels 1 · 2 · 3AA tiny bump or a rough joint can slow a marble down enough to stop it before the end.
Panels 5A · 5C · 6If you change two things together, you cannot tell which one made the difference.
Panels 3A · 3B · 4 · 5BEvery word from the artwork, in reading order — readable with the images switched off.
A Rollii & Friends Story
Ages 3–7 · Read together
My lightning headband is shining. Today I'll be the fastest!
My flag is up. This track is going to be the best one yet!
Red, blue, yellow, green — all four tracks are lined up.
I checked every piece. They all click in tight.
Working together to get ready
Today is Rainbow Marble Day at the Marble Lab. Everyone thinks it will be the smoothest day yet.
The finish line is right there!
Wait… why did it stop here?
Hold on. Let's look more closely.
Watching closely
One, two, three — go! The marble rolled down the ramp and around the curve. Then it stopped, just before the finish.
Let's make the start taller!
Changing too many things at once
The marble went faster — and flew off at the curve.
Let's add a jump! It can fly right over!
We changed it twice. It still stops in the same spot.
They added a jump. It still stopped in exactly the same place.
I tried and tried. It still won't move.
I'm done. This track is too hard.
There must be a clue. Let's look one more time.
I watched the whole time, and I missed it too. It stops in the same place every time — right?
Changing one thing at a time
Everyone went quiet. No one wanted to speak. Then, one by one, they nodded.
Look here. I think there's a tiny bump in this joint.
Making a guess, changing one thing, and testing again
Let's fix just this one joint. Don't touch anything else.
One more try.
After the first fix, the marble rolled farther — but not quite far enough. Then Mossy pressed the joint flat. This time, it didn't stop.
We did it!
It wasn't that I couldn't do it. I just hadn't tried enough times.
That's perseverance — trying again, even when it's hard.
Checking the answer — and what perseverance means
Ding! The finish bell rang. Far away, a map began to unfold — a ramp that climbed up into the clouds.
The track in this chapter is a marble run. Rollii and friends worked out where the marble got stuck — your family can run the same test at home.
The thinking behind the story — written for grown-ups and curious kids.
“Why Does My Child Give Up So Fast?” – Turning Frustration into ConfidenceWhat to say when your child wants to quit — and why trying again matters more than getting it right.“Another Broken Toy?” – Why Quality is the Secret to Logical ThinkingHow a single loose joint changes the way a toy behaves — and what children learn from noticing it.They are the four friends at the Marble Lab, each with one strength — coming up with ideas, designing, adjusting, and watching closely. Every chapter runs through all four steps.
"I'm going to be the fastest today!"
"The next stop is going to be even more exciting!"
"Look at the board — a steeper slope makes the marble too fast to turn."
"I saw it clearly — this time it held the bend, steady."
We'll email you the whole chapter as a printable PDF — ready to print or read on a tablet.
