Can you beat it?

http://smallcampus.net/html/maths_ga...iverIQGame.swf

(Click the biggest button)

-the thief can never be without the cop
-the mother can never be left alone with the sons
-the father can never be left alone with the daughters
-only two can cross at a time
-one has to come back on the raft
-kids can not travel alone on the raft
-get them all to the other side
-press the red balls to cross the raft
-a parent or cop can return on their own to get someone else