This is one for the more paranoid present receiver. Give them a gift that lets them pretend to be 007 and set booby traps around the room.
In the US this is available for a bargain price of under 30 bucks from our friends at ThinkGeek.com

You won’t find many unique presents for under $5 but here’s one that I’m sure most office workers will love it. It’s basically a utility belt for you old used mugs. Instantly transforming it into a cool holder for the many odds and ends that little most cubicle desks.
You can get this very different pen holder on the cheap at ThinkGeek.com