Step 1: Gather Materials & Tools
1 Pail, used here is a Folgers Coffee container (if you've got the cover it may make the last step easier)
2 keychain rings
a rubberband or two
piece of wire (paperclip)
2 plastic caps
Step 2: Prep Plastics
(ignore this paragraph if you don't have a cover for your container) cut the center out of the folgers cover keeping the sealing ring intact. This will be used to seal the plastic bag, if your bucket doesn't have this option don't worry, just use duct tape as described later on.
Cut the thredding sides off of the milk caps to make flat hard plastic washers. Melt a hole through the center with a wire heated in the candle.
Cut a hole in the center of the bottom of the folgers container. This one's 2" dia. Doesn't really matter how big unless you want to get into the formulas of how much air your chute pushes. Also melt 4 holes around the edge as pictured. Must be just big enough for your string to fit though.
Step 3: Tie the Knot
Step 4: Make the Chute
Step 5: Attach the Rubber Band.
Step 6: Seal the Deal!
You're done, use it to blow out that candle you were using to heat your plastic melting tool. I blew out a birthday candle from 15ft away and I'm sure it's capable of more if you can aim the darn thing. Fill it with heavy smoke and make smoke rings which make great tracers.
I built one out of a elec meter cover (hard plastic, a little bigger than an ice cream pail) which packs a punch. If it wasn't for the POOF! and the big smile on my face people would have no idea what hit them!