Parents can supplement their children's reading by playing stories in the car between lessons and practices or during vacations, she said.
AudibleKids will offer selections ranging from nursery rhymes to books for early readers to chapter books to young adult novels. Some books that rely heavily on visuals, such as books that teach colors, are not as adaptable, said Brian Fitzgerald, vice president of AudibleKids.
Some books are narrated by a single person, others are acted out like a radio play, with multiple voices and special effects, he said.
R.L. Stine, author of the "Goosebumps" series, who attended the launch, said he and his son are creating original material for AudibleKids. Author Brian Selznick wrote extra text for his illustrated novel, "The Invention of Hugo Cabret," so AudibleKids could record it.
Listening to stories shouldn't pose any risks to children's hearing, said Susan Brandner, the educational audiologist with the Newark school system.
"As long as the amplitude is properly adjusted, it's fine. If someone next to you can hear it, it's too loud," she said.
Scales, the library association official and a retired children's librarian, questioned whether the "digital divide" separating those who can afford computer technology and those who cannot might put audio books out of reach of low-income kids.
It was probably no coincidence the company chose to launch AudibleKids at the North Star Academy, a charter school where 90 percent of the kids receive free or reduced lunches, according to principal James Verrilli. Some downloads will be free of charge, and other titles can cost as little as $1.99, Fitzgerald said, adding that company research has shown more than half of third-graders own their own MP3 players.
"You can go to the library and download stories," he said of children who don't have personal computers.
The dozens of kids at the event said they'd use the players for listening to stories, whether for pleasure or homework.
"My English teacher makes us read lots of stories, so I will listen to do my homework," said Cristina Ramos, 12.
Even so, Verrilli emphasized, "This is never going to replace books at North Star Academy."
Visit AudibleKids at www.audiblekids.com.