I know absolutely nothing about mics and I'm hoping someone can help me. I have to take a short video clip of kids (one at a time) and each tells his/her name and interests very briefly – about 15 secs. The only trouble is it’s in a school situation which is always pretty noisy. Can anyone suggest a good cheap uni-directional mic to pick up the kid’s voice (some are pretty softly spoken) and block out side sounds. Each kid sits about 3 metres (max 5m) from the video camera which is a PanasonicAG DVC 62. Not too technical please. Thank you.