I was wondering if anyone here knew things about the foster care systems in the US for a story I'm writing... things like: How does someone get involved in being a foster parent? (I assuming there's a background check) What type of people usually end up getting involved? (single adults, married adults, older adults?) I understand that it's the intention for foster care to be temporary, but how long to people stay on average? If someone is a foster parent and wanted to get out of it... is it as simple as saying "I don't want to do this anymore."?