What the What?

Daddy sits in the office while Aidan plays outside the door,
Aidan: I wonder if this will work. Open Sesame!
Daddy pulls the door open.
Aidan: It worked!
Aidan then goes to the fish tank,
Aidan: Open Sesame! Hm, I guess it doesn't work on glass.
Daddy: Well, you don't want to open sesame the fish tank.
Aidan: Yeah, I would get all wet and water would get in my eyes.