sections, which involves higher level middle of the circle is to use the math than I felt like using… compass. Step 2: your circles with colored Then, use the ruler to draw a straight penciles, if desired. line from the paper fastener to each edge mark. Again, detail is important. You really want each of the Step 3: On the largest circle, make small pencil marks 3/8″ apart on the sections to be equal in size, or your decoder will be difficult to use. outside edge. You should end up with 27 sections. Detail is important in this step! This was where we got into trouble. We were Step 5: Write the alphabet on the trying to make three identical outside circle and put a ? in the 27th decoders. I had 28 sections on my first section. For the middle circle, you can try, and Aidan had 24. Obviously, those either write the alphabet in order or mix it two decoders were not going to be up. Aidan wanted a random alphabet in compatible! We figured out what we the middle circle I think it made it feel – were doing differently, and we decided more secret! that I would make all of the outside pieces so that they would be the Then add the smallest circle to the same. We had to start over on the large decoder. circles, and I made 3 with exactly 27 sections each. To write a message: Step 4: Poke a hole through the center set the code. The post on of the largest circle and the middle Spoonful suggests setting the decoder circle. Attach them with the where the on the outside circle “A” fastener. The best way to find the matches the first letter of the day of the
sections, which involves higher level math than I felt like using… Step 2: your circles with colored penciles, if desired. Step 3: On the largest circle, make small pencil marks 3/8″ apart on the outside edge. You should end up with 27 sections. Detail is important in this step! This was where we got into trouble. We were trying to make three identical decoders. I had 28 sections on my first try, and Aidan had 24. Obviously, those two decoders were not going to be compatible! We figured out what we were doing differently, and we decided that I would make all of the outside pieces so that they would be the same. We had to start over on the large circles, and I made 3 with exactly 27 sections each. Step 4: Poke a hole through the center of the largest circle and the middle circle. Attach them with the fastener. The best way to find the middle of the circle is to use the compass. Then, use the ruler to draw a straight line from the paper fastener to each edge mark. Again, detail is important. You really want each of the sections to be equal in size, or your decoder will be difficult to use. Step 5: Write the alphabet on the outside circle and put a ? in the 27th section. For the middle circle, you can either write the alphabet in order or mix it up. Aidan wanted a random alphabet in the middle circle – I think it made it feel more secret! Then add the smallest circle to the decoder. To write a message: set the code. The post on Spoonful suggests setting the decoder where the “A” on the outside circle matches the first letter of the day of the
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