Shh! It's a Secret! - Does your head still hurt from trying to figure out the Playfair cipher? Good! Give your brain a break and try this activity for fun. It is a simple substitution code. It can be done without using the letter frequency chart. Look for short 1-3 letter words and look for patterns.
The Presidency - Finish your "Fun and Games" item to take with you on your "campaign." You'll be "running" for President of SI next week, so make sure all your items are in tip-top shape and don't forget to dress the part if you can!