I use this as a lesson for my students, but this is a fantastic resource for Teacher Pay Teacher sellers who want to make their own icons and clip art. The lesson does require a scanner and the free program Inkscape. Inkscape is a great free alternative to Adobe Illustrator. It runs perfectly on Windows and Linux. It will run on a Mac but not natively. I typically have my students scan their doodles in advance and one at a time, or I scan them for them. I also like that Inkscape feels more user friendly once you get the hang of it. This is a step by step tutorial. No prior Inkscape knowledge is needed.
to visit the Inkscape webpage.
The tutorial is provided as a pdf and with a link to the Google Slides Presentation.