One was a girl who loved computer programming.
The other was a boy who had recently become interested in weather forecasting.
Together, we designed a classroom demonstration showing why important systems needed backups.
We didn't build a dangerous electrical installation.
We used a safe, low-voltage educational model with small lights, switches, and batteries under our teacher's supervision.
The first circuit represented a primary system.
The second represented an independent backup.
When the main supply was disconnected, the backup could keep a tiny indicator operating.
We also created diagrams showing how emergency messages might pass through different communication routes when one route failed.
I explained the limitations carefully.
A backup station couldn't solve every problem.
A battery couldn't power a whole town.
And trained people still needed clear procedures.
But the demonstration helped students understand why relying on a single system could be dangerous.
On exhibition day, our table attracted more attention than I expected.
Parents asked questions.
Teachers examined the diagrams.
Younger students pressed the demonstration switch and watched the backup light remain illuminated.
At one point, a boy asked whether the model was supposed to be Grandpa's pipe.
I smiled.
“Sort of.”
He looked confused.
I explained that the important idea wasn't the pipe itself.
It was having another way to perform a necessary function when the usual method became unavailable.
The boy thought about that.
Then nodded.
“So if one thing breaks, everything doesn't have to stop?”
I grinned.
“Exactly.”
For a moment, I heard Grandpa's voice.
That's a big word for not depending on only one thing.
I almost laughed.
Then the school bus driver approached our table.
Karen Willis.
The woman who had been stranded near Miller's Crossing.
She smiled when she saw me.
“Hello, Owen.”
I smiled nervously.
“Hi.”
She examined the demonstration.
Then looked toward the diagrams.
“You've been busy.”
I nodded.
She asked several questions.
I answered them.
Then she reached into her handbag.
“I brought something.”
She handed me an envelope.
Inside were handwritten cards.
Twenty-three of them.
One from each child who'd been on the bus that afternoon.
Some contained drawings.
Others simply said thank you.
One showed a school bus beside a mountain.
Another depicted a radio with enormous lightning bolts around it.
A younger student had written that she was glad somebody heard their driver.
I looked through the cards slowly.
Then I found one from the girl who'd been having trouble breathing.
Her handwriting was careful.
The message was short.