Warning: low quality pictures :(
Step 1: Materials
• scissors or knife
• duck tape
• party popper
• some string
• and a door
then you cut it. try to trim the popper as close as you can to the tubeish thing at the top that holds the powder roll.
(like in the second (blurry) picture)
then you take the p.p. string and tie it just above the knot, so that when pulled, it wont slip off the string.
then put a strip of duck tape across the other end of the string.