Crossing the river!

A small brain teaser activity :)

You must transfer all the people across the river in this flash river crossing game respecting the following rules:

1. The ferry can carry no more than 2 people.
2. Only the Adults (mom, dad and policeman) can operate the ferry.
3. Dad can not be in the presence of the girls w/out Mom
4. Mom can not be in the presence of the boys w/out Dad
5. The thief can not be alone with any of the family w/out the policeman.

Have fun :D