The sunglasses are just two of my old pairs I don't use now. But you can obviously find some at the dollar store as well.
The facial hair:
And of course, make sure you add a small notebook and pen to take notes.
And that's how my spy kit started out. Over a short time, we also added:
Spy glasses (which we got at World Market and you can find here. They allow you to see behind you. Very spy-ish.), my very old, broken camera (that he really wishes worked, but it doesn't.) and a cell phone for important spy-related communication:
Agent X gives this gift a thumbs up! Case closed!