What I think of when reading your post, is a lesson I have participated in as a preservice teacher, with the supervising teacher and 5th graders in my field placement. The topic was the solar system, and each student drew names of planets from a bowl (including the asteroid belt) the teacher was the sun, and each student (there were only 9 because of the way hybrid is set up here) lined up in order of distance from the sun. It wasn't really an experiment, but was done outside in a large grassy area and followed the 5E steps. The students orbited around the sun and they later learned about orbit, and other vocabulary and concepts associated with the standard. Hope this is a helpful idea!