You will need:
One black shirt (your size)
Puffy paint (your choice)
Lay the shirt flat and flip to the side that you want to do first.
Put the card board inside the shirt and flatten the shirt.
Paint you last name at the top and fill the side with pi related symbols/equations.
Wait for that side to dry, flip the shirt over paint and let dry.
Wear your shirt proudly on 3-14-13!!!!!