"Everybody crosses the river." 
The  rules are:
>
>Click on link then click on Blue Circle. Use the rules  below.
>
>This is going to do your head in, but it can be  done.
>
>Apparently, this is an IQ test given to job applicants in  Japan:
>
>"Everybody has to cross the river".
>
>The  following rules apply:
>
>Only 2 persons on the raft at a  time
>
>The father cannot stay with any of the daughters without  their mother's
>presence.
>
>The mother cannot stay with any  of the sons without their father's
>presence.
>
>The thief  (striped shirt) cannot stay with any family member if the
>Policeman is  not there.
>
>Only the Father, the Mother and the Policeman know how  to operate the
raft.
>
>When you see a Yellow Circle, that means one  of the rules have been
broken
>and the raft will not  move.
>
>
>To start click on the big blue circle on the  right.
>
>To move the people click on them. To move the raft click  on the pole on
the
>opposite side of the  river.
http://freeweb.siol.net/danej/riverIQGame.swf
Oh, of course part of the email I received explained how the Japanese use this as an IQ test when hiring prospective employees. Stupid email fowarders.