This is a great activity to use in junior music! You can have use this mystery message game to test rhythm knowledge or pitch. Below each letter of the alphabet is a measure of music. The teacher students in partners will clap one of the measures in order to guess the letter. To break the secret code, students will have to compare the measures, figure out which one is being clapped and keep track of all of the letters. Once all of the bars are clapped/played, students guess the word/phrase to see if they are right. Students love this.