Yes, it does sound somewhat childish. I also notice some grammatical errors and odd word choices:
When they arrived , we made them visit our school.
After they arrived, you
forced them to visit your school? Surely, that can't be what you mean.
They asked principal to instruct students not to use abusive language anywhere and to speak in english wherever they go.
Really? The visitors to you school were so rude as to ask the principal to direct the students not to speak their own language?
"This was my first experience being a host for
the foreigners
, so
Ifelt a little bit
feeling nervous."
"I
invited them to have
a lunch with my family
, and they enjoyed it."