EASY POINTS!!! Ideas for science project??

Question

I am doing a science project, and on the front page of my scrapbook i am making it look like one of those envelopes with confidential stamped on it (like in Clue, the board game). It looks too plain with just confidential, so do you have any ideas of what else could be stamped on it? Like "Property of the Federal Government: Do not open!" or something official sounding like that.

Answer 1

how about something like: Top Secret: Level III clearance.

"Need to Know" only

Answer 2

official case of the FBI do not open

Answer 3

Since it is for a Science project, why not make it something like:

This area under strict quarantine - DO NOT ENTER

Biohazard - DO NOT ENTER

Substance extremely toxic - DO NOT HANDLE

Put some sort of biohazard symbol on it like the red skull and crossbones that everybody knows