Check out this game. Don't pay attention to the Japanese text, just press the big blue button to start it. Click the person to put him or her on the raft. Click the lever to go to the other side.
Here are the rules:
You have to transport everyone to the other side.
Only adults can operate the raft.
Only two persons can be on it at the same time.
The prisoner cannot stay with the civilians.
Mum cannot stay with the boys alone, because she attacks them. (WTF? Japanese gender fight?)
Dad cannot stay with the girls alone, because he attacks them. (Sigh.)
If you solve it then please post in a comment how long it took for you. I'm interested in the averages. :)