Most kids have grand ideas about what they want to be when they grow up, and most parents try to indulge them. For example, if a kid wants to be an astronaut, you'd get them a toy rocket or space stuff. Or if your kid wants to be a cop, you get them a badge and (depending on your view of such things) a toy gun.
Of course, if you or your kid has somewhat lower expectations, there's always this.
My wife almost fell off the couch laughing when she saw this, by the way.