WiFi Help?

Hello Mates,

I have an Airport Extreme base station and am curious if there is anyway to allow temporary access to my wifi signal its configured with a WPA passcode. I have neighbors that come over and use my wifi but then continue to use it when they return to their homes, is there anyway for me to allow them temporary access or create some kind of guest network that I could turn off when they leave? I HATE having to change the administrative password when they leave because I have to re-enter it on all of my devices.

Any help would be GREATLY appreciated!

Thanks,