Create a code using a different block or combination of blocks for each letter of the alphabet. After creating your own unique code, use that code to record a secret message on a flat piece. Ask a peer to decipher your secret message, using your code. We love trying out a fun STEAM activity in the classroom! This one can be used again and again as a soft start morning work activity, recess, or STEM Challenge! Included:Directions pages, coversheet, letter strips, planning pages, recording pages,