You can add uncompleted shapes, photos, diagrams, etc. and ask students to complete them on online questionnaire platforms. Every level may have more complex shapes than former. And evaluating them by stage of complexity they can prepare for each level at the specific limit time. Hope it will help you for new ideas.
No, there are not. Keri Smith is an illustrator and author of several books to practice and explore self creativity. I think you can find some references and inspiration in her work. Maybe, there are some free tools on her website. http://www.kerismith.om