Re: Punishment for this?
He did three things wrong IMO
He did something silly that he is old enough to know not to do (throwing the keys on the roof)
Framed his sister
So he needs 3 punishments for the three infractions.
(1) Would lose the privilege of being unattended for a week. (since you said it is an on going problem)
(2) I would sell his stuff to earn the thirty dollars your DH missed out on.
(3)He would be doing something nice for his sister for a week for trying to frame her (Cleaning her room, doing her chores or whatever )
Helpmeet to a wonderful DH
Mommy to A
Angel baby 12-25-11
4-16-13 - 4-30-13
due April 2014