Teasing

Do you ever tease your kids?
I love to tease mine. Surprisingly they still fall for it every time. One of my favorite things to do is when they ask for something, like a piece of cake, I say, “Oh, I just ate the last piece” then of course they start to cry. I also like to hide from them. Am I mean?
One day my son came home from school on early day (age 7 at the time), he came and found me, acting surprised I said to him “Thomas, your teacher just called and said you left too early and need to go back to school.” Oh the look on his face was priceless.
But I still tease them as much as possible. He is starting to catch on and not believing every thing I say.