Pictures of planetary spacecraft work the best since they have the least amount of their equipment hidden or encased in the body of the spacecraft. In the other direction, the students can be prompted with spacecraft parts and challenged to identify the relative anatomical part. The list below is not exhaustive but it sets the stage for a good follow-on activity. Identify a mission and a destination for a spacecraft and have teams of students design the spacecraft. They must be sure that the spacecraft has all the correct parts to fulfill critical functions.
Rovers require ways to move and navigate.
We human beings are built, and have to do certain things, to remain alive. The same is true for spacecraft. They must communicate the data back to Earth and receive new instructions.