Here's some links to help you develop your characters and understand how to act in the 1920's era.
http://local.aaca.org/bntc/slang/slang.htm - Slang of the 1920's
http://www.ssa.gov/OACT/babynames/decades/names1920s.html - Popular baby names of the 1920's
http://en.wikipedia.org/wiki/Flapper - Wikipedia's page about Flapper style
http://www.westegg.com/inflation/ Inflation converter
If you have any more resources to put up, please post them here and I'll add them to the list.