This is a quick and dirty version that my son and I made since New Years Day is coming soon. It is constructed out of scrap wood from my workshop. You can make your version as fancy as you want! :)
IMPORTANT NOTE: Kids should never use fireworks of any kind! Follow all safety instructions that come with your fireworks. My son is in the picture just to show how to pull the handle. The cannon is not armed.
Step 1: Operation
Step 2: Construction
Step 3: Axle and Safety Pin
Step 4: Attaching the Lever
Put the axle through the axle holes and lever. The lever should have a long string tied to it about half way up.
Step 5: Threading the Lever String
After that, pull it under the axle.
Step 6: Loading the Popper
Tie the party popper string to the lever string.
Step 7: Fire!
After that, put a new party popper in the hole, tie it to the lever string, and pop again!
You can also load multiple poppers at once by tying them both to the lever string.
Step 8: Conclusion
The popper cannon works very well and directs the "pop" away from the person who is firing it.
I didn't include the exact dimensions since this is a quick and dirty version. I just wanted to show the basic setup. I also didn't spend time on the asethetics since it will only be used for one day, and then dismantled. (These scrap pieces of wood will be used again for other things)
This design has a lot of room for improvement, so I look forward to your feedback and pictures of your own party popper cannons. Have fun, be safe, and happy new year!