These are really easy instructions for making your own coloring page using MS Word.
If you don’t have MS Word, then download LibreOffice. I use it all the time because: it’s free and it works just like Word (only better). Read more about LibreOffice @ Wikipedia. After you create your coloring page in LibreOffice, save it as any kind of document, including MS Word. You can even to save documents as a pdf so that you can share it with all your friends.
Now, about that coloring page techtorial . . .
Get full details here: Education World Techtorial: Make a Coloring Page in Word