Sundial Cannon's where used in the past as a novel way of announcing noontime with a loud noise. It is essentially a sundial with a place for the small cannon or firecracker to light by using a magnifying glass. Thanks to miniature cannons being on sale on Ebay you can also make your own.
Please use it responsibly and safely.
Step 1: Gather the parts needed
One paver kit - $20(bought on sale 1/2 price at Hobby Lobby)
One Mini Cannon - $50 - http://www.pocketcannons.com/
One "Helping Hand with Magnifier - amazon($10 with shipping)
Old credit card
Sundial Template (search sundial generator)
Paint or Markers
optional(spray paint to protect "Helping Hand" from rusting outside)
Also scissors and a small wrench