A very cool project you should be aware of is Diversity Avatars. Right now they have a collection of free avatars that you can download that feature a number people from different cultures. From pop culture icons to civil rights heroes, this budding collection is awesome. They are working on 800 more icons and the collection can be preordered for 99 bucks.
Our world is diverse and our avatars should be as well! Creating avatars is a great way to get our students thinking about the world. Apps like Assembly, Sketch, or even slide decks can offer students the ability to use shapes to create images of people and animals.