Dear Ben,
Thanks for your letter! It was great to hear from you again. Regarding your message about summer camps, yes, I have been to a camp last summer. I liked the activities and making new friends the most. I would love to go to an international summer camp!
How about you? Have you ever been to a camp? What did you like most about it? Would you like to go to an international summer camp and meet new friends?
How are your friends in the camp? Are they enjoying it? What activities do they do?
Best wishes,
[Your Name]