When did you realize you wanted to be counselor?

The interviewer wants to make sure this wasn't an idea you thought of two weeks ago, and here you are ready to commit to a full summer. Tell them you have always been passionate about being a camp counselor, since you were once a camper. Or, if you never attended camp, tell them you had an excellent role model as a youth, and you've wanted to pass on the mentoring that you received to others.