Steve Wozniak (Apple Co-Founder) likes to buy sheets of $2 bills from the Treasury (you can do that), and cut them in front of the person he is paying. A time or two he was called for counterfeiting. Harmless rich guy fun.
You can also make a money pad with a cardboard backing, some gauze, and a little rubber cement. Just peel off as many $2 bills (or whatever denomination) as you need. Easier than buying sheets of bills from the Treasury.