Sharing Hands

We have been working on the wonderful concept of sharing in this household. 
Here is a conversation we had in the car....

Haven:  (in a concerned voice) "Mom!  The hands are not sharing!"
Me:  "What hands?  Haven's hands?"
Haven:  "THESE hands!" (while holding up her hands with a sippy cup in one of the hands) 
Me:  (After sitting silently for a moment deciding how to respond)  "Well you better teach them how to share!"
Haven:  "Yay!  They are sharing now!"