The cast:
Big, Bad Three Year Old Brother

Sweet, Innocent 18 month Sister:


What you don't hear in this picture is the "May I have some, Please?" that did precede the following scenario:



Don't think she is so sweet as she proceeded to storm after him screaming "MINE":
Then, the 3 yr old delighted in aggravating, resulting in the following scenario:
Timeout.

Sister comes to keep him company.
They'll figure it out by the time their adults and be best friends.
Hopefully it will happen a little sooner...
In the meantime, I'll play referee and laugh a lot behind their backs.