Limiting number or closing oldest open Safari windows

Question

My son is autistic and opens so many new Safari windows playing flash movies that his MacBook often becomes so unresponsive that it's faster to hard reboot it than wait for the force quit dialog to come up.

Is there a way that I could either limit the amount of windows that he can open, or even set a periodic job to close the oldest open ones leaving a certain amount open?

I know absolutely no AppleScript, any pointers would be welcome.

Answer 1

--This script will limit the number of Safari windows you can open

tell application "Safari"
    repeat
        if the count of every document is greater than [number] then
            repeat until the count of every document is [number]
                close the front document
            end repeat
        end if
    end repeat
end tell