Dear sir/madame
I'd like to introduce myself. My name is Ellen and I am an 16 years old.
Ever since I saw the advertisement, I have been wanting to apply for the part-time job at the summer camp, because it looked like the perfect job for me. I saw the advertisment for a part time job. I wanted to apply for the job at the summer camp.
I wanna work there because there are a lot of outdoor activities lots of activities outside and I love entertaining playing with children kids all day. I am a very kind and entusiastic person which my family can confirm tell you to. When I'm working there I want to practice and learn to improve my English skills, especially my pronunciation.
I think I am the perfect fit for this job and I'm definitely willing to learn in order to become a better employee. I hope this letter has convinced you of this as well. I hope to hear from you soon.
Kind regards,
(signature)
Ellen