"Frustration and Pis (please)!"

Starting last week, I notice that Qi Ning begins to show one other emotion strongly ie frustration/anger beside the usual happy and sad. It happens when I took away the toy that she repeatedly throw on the floor despite being told not to. When I took away the toy, she began to clasp her two hand together and begin to pull as if doing a tug of war with her own two hands, of course couple with protesting cry! Actually, I feel "xin tong" (heart ache) to see her doing that but discipline still need to be in place.
Another very tough situation for me is when she keep saying "pis" (her please) to request for things that she is not suppose to have. For example, last Wednesday evening, we were at church and there were people playing table tennis. She was very excited and during the break, the kind uncle yap let her have a goes at the table tennis by putting her on the table tennis table and give her the bat and the ping pong. she was enjoying it. then later when they resume the game, she gave back the bat and ping pong ball, stood aside and watch them play. Few minute into the game, she began her "pis" request ( we teach her to say "please" when she wanted something), she wanted the ping pong ball, that particular one that is going to and fro the table! She tug at her hands again when her request was not fulfilled and keep on her "pis" repeatedly!! Is hard to refuse when she keep saying "pis". She is at the stage where she begins to know how to demand and make her request known. She sure knows what she want or don't want!
Training and teaching a toddler sure require lots of wisdom and patient! May God grant me both!!