Howtoons shows cartoons (you can download the PDF versions) designed for kids to learn how to make various things. They’d be accessible to Intermediate English Language Learners, and would be good models for students to create their own.
It’s an offshoot of the popular Instructables site, which shows instructional videos and other “how-to” ideas in various forms. Instructables, though, isn’t on my The Best Online Instructional Video Sites list because it has come content not appropriate for classroom use.
Thanks to Keisa Williams for the tip.