I have taught this as an art teacher/art sub and have found that students get highly engaged in this lesson.
You may find this lesson at my TeachersPayTeachers shop.
Afterward, they add all the details they can imagine. They are encouraged to think about what sorts of jobs their robot could do; what background would fit in their plan; and what other objects would fit well in the drawing. They are given tips on how to color neatly to finish the work. When teaching this lesson as a sub, I have never had a disinterested student.