Steps

1. Come up with the basic idea/design for the cannon (here is ours):



2. In Lid # 1, cut a circular hole, about 1.5 cm in diameter:



3. Cut can #1 all the way around at about 3 inches up. Then trim about .5 inches off of the small section you just cut off:



4. Take the lid and place it between the bottom and top halves of your #1 can. Tape the lid into place between the two. It should look like this:





5. Take can #2 and cut a circular dip out of the top of it, measuring it so that your #1 can can rest inside the dip and have the proper angle:



6. Tape the two cans together at the 'dip', making sure that the #1 can is at the correct angle.


7. Put a hole in the base of the #1 can for the wood splint to go through. The final cannon had about a 45 degree angle on it: