<p>I remember a childrens group (ages 6-13) who were rehearsing a song and dance revue. Each child had a small solo. After they had rehearsed several days and each knew his part, we brought in a karaoke machine with two microphones so that they could get used to hearing the sound played back to them and also get used to holding the mikes. About half-way through they were all crying because they thought they sounded so bad! It was like it was the first time they had heard themselves.</p>