Responsible

How the way of teaching the kids to be responsible of what they did?
One of the kid throw the crayon on the floor and he refused to pick it up and he cried.
The other one, she accidentally drop the things onto the floor, she refused to pick them up even I said to her gently and helped her along. I was angry of how she reacted to me. i picked them up. And straight after then, i turned to other kids and left her alone. I didn't response any words of her; i didn't join her in our playing.
She is a clever girl. She'll know what's the right thing to do next time.