In 200 years, what do you think is going to be worth a fortune from 2012?

Okay, I was looking at scholarships a few days ago and I found this one that stated:

“In 200 years, one of your relatives is going to be digging in what is now your backyard. They are going to find something that you buried in 2012, and it is going to put any financial worries they have to rest. Your job today is to decide what to bury. Your goal is to find something that will have immense value in the future.”

I wrote mine already, but I was just wondering what other people thought!