Boom! Br-r-ring! Cluck! Moo!--exciting sounds are everywhere. Whether visiting online sites that play sounds or taking a "sound hike," ask your students to notice the sounds they hear, then write their own book, using sound words, based on Dr. Seuss's "Mr. Brown Can MOO! Can You?" During the three 45-minute sessions, grade K-2 students will: explore the connection with between letters and letter combinations (graphemes) and sounds (phonemes) by identifying sound words, or onomatopoeia, in texts they hear (or read) and matching words to sounds they hear; explore a variety of strategies to spell the sound words that they associate with sounds they've heard; and compose books that focuses on sound words. The instructional plan, lists of web resources, student assessment/reflection activities, and a list of National Council of Teachers of English/International Reading Association (NCTE/IRA) Standards addressed in the lesson are included. A brainstorming sound words handout; a sound observation chart; example sound words; and a 16-item list of books that feature sound words are attached. (RS)