Kids love having stories read to them, but astronauts reading from space is even better.
The Story Time From Space program began in 2011 to get children excited about science.
Now, the program is gearing up to send seven more picture books to the International Space Station, in addition to the five books already there.
Once in space astronauts film themselves reading the stories for children to watch online.
The books are due to launch in just over a month.
Interestingly, two of the books going, Mousetronaut and Mousetronaut Goes to Mars were written by Mark Kelly a former astronaut.
If the books arrive by the end of the year, Kelly's twin brother, who is currently on a one-year space mission should be able to read them.
Story Time From Space's creator, Patricia Tribe told ABC News: "It was such a neat opportunity," referring to the the brothers.
Other books heading to space include:
- Rosie Revere, Engineer by Andrea Beatty
- I, Humanity by Jeffrey Bennett
- Endeavour's Long Journey by John "Danny" Olivas
- Moustronaut & Moustronaut Goes to Mars by Mark Kelly
- The Rhino Who Swallowed a Storm by LeVar Burton
- The Incredible Intergalactic Journey Home by Lost My Name
The Incredible Intergalactic Journey Home is a book personalised for seven-year-old English boy Roraigh Curran.
Curran won a competition to have the book (personalised about him) sent to space for reading.
"It's amazing," Roraigh told ABC News. "I just like the fact that it's all about me!"
In 2011, Astronaut Alvin Drew trialled the idea of reading stories in space to children as a favour to Tribe, who was trying to get NASA on side, reading Max Goes to the Moon by Jeffrey Bennett.
The idea "was easy to go run with it after that," said Drew
Next to read stories from space were NASA astronaut Michael Hopkins and Japanese astronaut Koichi Wakata.
Watch some of their stories being read in space here.