You are interviewing for an internship and your potential employer wants you to tell them about yourself. Your first instinct is to:
Outline your area of interest; how you have applied these ideas to your real world experience, and how you think this applies to what you want to do after you graduate
Speak to specific events and achievements you are most proud of; tangible things you have made or built, such as performing in a play, raising money for a charity, or a DIY project you completed
Share your passions in life; what you hope to achieve and things you have done so far to help you get there
Give an overview of responsibilities you have been trusted with; school committees or clubs you belong to, any extra-curricular activities you are involved in, part-time jobs you have had, and so on