Do Plants Sneeze? was a project by Greg and Rodrick. In Rodrick Rules, it wasn't shown if Rodrick won anything or not however in the online book, Rodrick got no ribbons for the project. Rodrick Heffley thought plants probably sneezed, but after testing with feathers, pepper, and feet, concluded plants didn't sneeze. He goes on to make another science project about plants called "What Type of Music do Flowers like Best?"
- Diary of a Wimpy Kid Online (First appearance)
- Diary of a Wimpy Kid: Rodrick Rules (First and only book appearance in book series)
- Wimpy Wonderland