One possible version:
Dear Bob,
I'd like to tell you about out hobbies.We both like collecting things.I like collecting shells and Linda likes
collecting movie tickets.I have been collecting shells for five years and I have collected about 220 of them.
I store them in a box.Linda has been collecting movie tickets since she was ten years old.She has more
than 350 of them now!She got most of the tickets from her friends.
Can you tell us about your hobby?
Yours,
Nick