Dinner Conversation

Dean: Hey Mommy. Guess what? I have something for you.
Me: You do? What is it?
Dean: A costume! And you know what you can do?
Me: What?
Dean: You can come to my work and then I will take it out (demonstrates how he'll take it out) and I will put it on you (more demonstrating). And it will be a surprise.
Me: A surprise? I can't wait!
Dean: But, but I will tell you what your costume is. I will tell you.
Me: What is it?
Dean: (Pause for effect) Batgirl!!
Me: I get to be Batgirl?? Oh, that's great!
Dean: You can borrow it. (Nodding so I'll understand) You can.