Secrect code machines

Make a code machine with your best friend.  You can write coded messages to each other.
First one is Julia's number and alphabet code machine. 
Second is Lucy's Egyptian alphabet and English alphabet code machine.

How to make ?

• Cut two circles from thick card paper. One is bigger than the other.
• Equally divide the circle to 30 segments. 
• Write the letters or numbers around the edges of the two circles. 
• Use a paper clip to secure two circles' center together.  
• Decorate your code machine!

How to use?

When you write your secret message, you need to tell your friend your key. For example k=14, then you translate your secret message into serial numbers using your code machine. See below:

12             15  18  25  8        28  18  24


(  I love you )