This decoder is used for decoding and coding the caesar cipher.
You could make two and give one to your friend so you can send secret messages to each other
Step 1: Materials
Soft drink can
a paper clip (I forgot to take a picture)
Step 2: Cut Up the Can
Use the stanley knife or scissors to take off both ends of the can. I prefer using the knife to the scissors.
Step 3: Prepare the Can
Cut the cylinder to make a rectangle and flatten it by rolling it backwards
Step 4: Draw & Cut Out the Parts
Radius of the small circle is 2 cm and radius of the big circle is 3 cm.
Cut them out with a stanley knife or scissors
Step 5: The Maths-Outer Circle
Step 6: The Maths-Inner Circle
This is how to work out how wide each letter should be
Step 7: Draw the Spaces
Use the previous calculations to space each sector. Try to get them as accurate as possible.
Make another circle on the smaller circle with the pen with about a 1 cm radius.
Step 8: Draw on the Letters
Draw on the spaces where the letters will go first
Step 9: Put It Together
Put a paper clip through and bend the ends over it or you could put some hot glue on