It's possible you're thinking of:
* The "Do-It-Yourself" section in some Diary of a Wimpy Kid books: Some of the books, particularly the earlier ones, have sections with activities like drawing, creating your own comic strips, or making lists. These are not separate books but sections within the regular Wimpy Kid books.
* Fan-made or unofficial "Do-It-Yourself" projects: Some fans might have created their own DIY projects inspired by the series, but these wouldn't be official.
If you can provide more context about where you saw this book, I might be able to help you further.