Setting up the Meter Stick and Marble-drop  | 
 
First Marble Drop  | 
 
Several Marble Drops and Data Recordings  | 

 
Measuring out the 4 Inner Planet Distances  | 
 
Jen counting out the distance between Mars and Jupiter  | 
 
Drew marking the distance to "his" planet.  | 
[N.B. This idea came from the National Radio Astronomy Observatory in Green Bank, West Virginia, and from NASA's JPL website.]