Put the Pringle can on top of the card board and draw around it.
Cut the card board out a little smaller than the circle you just drew so it will fit inside the can.
Then staple the rubber bands onto the piece of card board.
Use the small nail to poke two holes just under the silver rim about 1/2" apart.
Do the same on the opposite side across from the holes.
Put the fishing line through the two holes and tie around the rubber bands. Cut the extra fishing line off.
Do the same on the opposite side.
Put the two tennis balls into the can. The tennis balls are for weight so when you friend pick up the can of Pringles it wouldn't feel empty. You can use something else but tennis balls fit well so I used them.
Put the empty soda can on the card board launching platform and put the seal and lid on top of the soda can.
Push down and closed the lid.
The Pringle can is now LOADED! and ready to scare your friends when they open it.