Linking words/phrases to add an idea
a) moreover,
b) Furthermore,
c) What is more,
d) One more reason why...
e) It is undeniable that (=nobody can deny the importance of
4th: Conclusion:
hope that your opinion will be taken into account
(considered)
politeness is the key for the conclusion
you mention that you look forward to hearing from the person you wrote to.
Date, right below your address: e.g. 26/10/2013
Closing greeting: Yours sincerely (if you know the receiver) / Yours faithfully
Arguments
How children are related to this person?
What does this person have to "teach" children?
How can possibly affect the future of some children?
What is your suggestion: chilren's writer/
sportsperson/chef/ something else?