Try out this Japanese IQ Test. Steph sent it to me. Click on the Big Round Blue Button & Start. Here are the rules:
Get everyone across the river!
Max 2 people on the raft;
Mom cannot be with boys without Dad;
Dad cannot be with girls without Mom;
Thief cannot be with anyone without Cop;
and only Dad, Mom, and Cop can operate raft.
Big blue circle starts game.
I will post the answer to solve in the comments later.
The solution is now in the comments. So, don't look there unless you want to find out the answer.