Age when kids write Cancel Title is required

Hello All

Something I was wondering about kids in Zambia. I sponssor Prisca from there. When I  first sponsored her she didn't write me a family member did. Well then she wrote her own letter to me. I told her she did a wonderful job, then I got another one from her that she wrote on her own. Well this was months ago. The last 2 letters i got her Aunt wrote me again. I'm wondering why this would be?

Could be a form of shyness? I was able to write publications really easily until someone told me my last one was excellent - for some strange reason, it made it harder to write the next ones rather than easier. Eventually I got over it, and I'm sure Prisca will if that's the issue.