To do the butterfly stroke, a big kick and a small kick are both necessary. Learn how to do the butterfly stroke with both a small kick and big kick in thisfree online swimming lesson on video. Expert: Peter Elizondo Bio: Peter Elizondo swam on the Varsity team in high school. He has literally taught over 400 adults to learn how to swim, and has taught over 900 kids ages three years and up on how to swim. Filmmaker: Devin Boddie