Read this report about a girl's camp experience:
I plan to become an astronaut when I grow up. This has been my dream ever since I read about Sally Ride. She was the first American woman to travel in space.
This summer, I got the chance to experience what it's like to be an astronaut. I spent part of my vacation at a space camp for kids.
For six days, I got to do what an astronaut does. Part of my training included a "space mission." I worked with a team of other kids from all over the world. We took turns playing the roles of mission-control operators and shuttle-crew members. I discovered what it feels like to be weightless and to spin in orbit. I also learned how difficult it is to do anything while wearing a space suit!
What is the main idea of the first paragraph?