Prompt is showing the child how to position their tonge and lips to form the word. When a child can't position their mouths for the W sound they squeeze their cheeks to show them how to posiion their mouth, mind you its a lite squeeze NOT a hard one. Prompt does work!! It helps with articulation issues. My son gained 4 months in language in 2 months time. <img src="/images/graemlins/rolling.gif" alt="" />