One of the most important skills for children to develop in the kindergarten year is the recognition that letters and sounds are related. It is often called "the alphabetic principle"--the notion that speech sounds can be connected to letters in a predictable way. To grasp the alphabetic principle, children need to understand that: (1) letters represent speech sounds; (2) letters go together to make words; and (3) changing the letters changes the sounds and the words. In this article, the author presents some interesting activities to reinforce the connection between letters and sounds all around the classroom.