The Cookie

I fake a zombie and steal the cookie

Aww cute! I don't think she performs live anymore though due to her illness. :(

I'll tell you to look it up. You pick up your phone and I will pick up the cookie. :D

I win a massive stuffed toy bear at the amusement park and I throw it at you. In the process of catching it, you can't hold the cookie properly and I slip it out of your fingers.

I take you to a haunted house and since you are holding on to me, I'll take the cookie. 

Photographers. :P Even with a phone camera, you still need two hands to operate it.

I bring you a cute kitten (or a puppy if you prefer) and you are so won over that you forget all about the cookie. Tada!

I feel under the weather so you come to check on me. You ask how you can make me feel better. I say, maybe if I had the cookie. You take it out and I grab it and smile feeling better. *skips away after emotional manipulation*

When you fall asleep, I'll take the cookie out of your hand and replace it with a fidget spinner. :)

I'll 3D print a cookie and subtly replace it while stealing the real deal.