Here is another whiteboard robot that can create works of art thanks to a Raspberry Pi 3. The gocupi is a vertical plotter with 2 stepper motors and a gocupi board that sits atop of the Pi unit. It also comes with suction cup motor mounts and Nema 17 stepper motors.
The robot simply handles and moves a dry erase marker to draw on your whiteboard. You can order the kit here.