The Giving Tree
The Giving Tree was a Christmas Tree where a person had to write a note saying that the person wants something and put it on the tree. Another person has to take out any random note and give the person the thing they want. Greg Heffley once asked for money, but wrote that the person has to put the money under the bin because Greg knew Susan Heffley wouldn't allow anybody to give him money. It only appeared in Cabin Fever.
- This is actually the 1964 book, "The Giving Tree" by Shel Silverstein. This book was mentioned in the Diary of a Wimpy Kid: The Last Straw.