I create really unique stuff that isn't available elsewhere. It first started when I created a magic spells and potions writing unit because several of my students really didn't like writing. After doing this unit they came to LOVE writing and their favorite part was making it unique for them. One student even created a "spell" that allows her to transform into a unicorn and create rainbows to "bring joy all over the world."
I also create project-based unit studies, book companions, and writing lessons for 1st to 5th grade. Almost everything I create has a theme. For example, I have a year-long opinion writing bundle, and each month has a theme (December is Christmas, March is St. Patrick's Day, etc.).
I also have book companions for the entire Magic Tree House series, which I created because I couldn't find what I needed after exhaustive google searches.