A couple of years ago my Dad got the girls 'Walter the Farting Dog'. See here. It is actually a pretty good book.
The other day a gift arrived from Kerry for Christopher. It wasn't his birthday yet, but I guess she saw it and thought of Pat. The card read:
'Dear Christopher, Since girls "don't do this", you must carry the mantle. Here is your guide. When you are ready you can meet master Yoda-Grand-Dad in Bethel who will explain the rest.
Love Aunt Kerry'.
The book:'The Gas We Pass'