Hi Ms. Tipton, I am excited to answer the questions of your 3rd graders. I have never been out to space, but there are many resources to find out this answer on the internet. One great source I would suggest looking at is the NASA website: https://www.nasa.gov/. NASA is an independent agency of the U.S. federal government responsible for the civilian space program, as well as aeronautics and space research. They have sent many astronauts out into space. I also found this very interesting and insightful article from the Washington Post: https://www.washingtonpost.com/graphics/2019/national/50-astronauts-life-in-space/. One of the most interesting parts of this article is the weightlessness. Anything that is not pinned down floats away! I hope you find these resources helpful!