It was a busy day at Metro City Central Bank.
"I need some money," a customer said.
The bank teller typed on a computer.
A drawer popped open.
"Uh-oh," the bank teller said.
"There's no more money in the drawer.
Wait here. I'll get it from the safe."
He went over to the safe, unlocked the door, and opened it.
The bank teller gasped. "All the money is gone!"
"Wow!" Mara said. "Saturn's rings are amazing."
Roxy and her friends were in the computer center at school.
They were doing research projects for science.
"I'd like to run around Saturn on its rings," Jack said.
Mara rolled her eyes. "You can't run on Saturn's rings, Jack.
They're not solid. They're made of chunks of ice and rock that float around the planet."
Terrell looked over from his computer.
"I'm researching the first moon landing.
You could definitely run on the moon.
You'd need a spacesuit though."
Roxy nodded. "Plus, there isn't much gravity on the moon.
So you could jump really high."
Jack stood up. "Earth, this is Astronaut Jack.
I just landed on the moon.
I'm going to try moon jumping now!"
Jack jumped as high as he could.
Roxy, Mara, and Terrell laughed.
Miss Apricot walked over.
"Jack, did you pick a topic for your project yet?"
Jack scratched his head. "Uh, I might research aliens."
Miss Apricot sighed.
"Please pick something more serious than that.
And stop jumping."
"Okay, Miss Apricot." Jack sat back down.
"What are you writing about, Roxy?" Terrell asked.
"Well," Roxy said. "I picked the planet Mercury.
But it's not very interesting."
Terrell looked thoughtful for a moment.
"I have an idea—Rocket Girl."
Roxy tried not to laugh. She knew Terrell was kidding.
"Very funny, Terrell.
But Rocket Girl has more important things to do than help me."
Terrell shook his head.
"No, I meant you should write about Rocket Girl.
She can fly through space, right?
And she's probably as fast as a comet."
Mara chuckled. "That's ridiculous, Terrell!"
"It's even sillier than my alien idea!" Jack said.
Just then Roxy's watch beeped.
"I'll be right back," she whispered to Terrell.
"Mayor Bloom is calling me."
Roxy stepped out of the computer center.
"Mayor Bloom, what's wrong?"
"I need your help, Rocket Girl!" Mayor Bloom said.
"Metro City Central Bank was just robbed."
"Don't worry, Mayor," Roxy said.
"I'll be there right away!"