Essays / I need to write an essay to get accepted to a summer camp? [3]

i dont know how to start So, I received this application for a free summer camp about math, science and technology, and only 30 girls can go, and I want to be one of them. i am a 5th grade I have excellent grades and a good teacher recommendation I just have to write a 500 words or less of why I want to go and why they should pick me. Please help with intro.