We are working on Apologia’s 2nd edition of Exploring Creation with Astronomy for an upcoming review. We also have been using the science kits from Magic School Bus and there is one about the solar system.
We used one of the projects from the Magic School Bus kit to create a solar system mobile. There is a foam ball for the sun and bouncy balls for the planets. I only wish they had color co-ordinated with what we expect a bit more and that the sizes were more varied. All is good, though. It gave us more fodder for discussion and evaluation.
Using the foam ball as the sun, we stuck wires through it and attached the bouncy ball planets on the ends. The girls had to adjust the wires carefully so that the planet closest to the sun was, in fact, closest to the sun but that meant the other end of that particular wire was farthest away. That meant evaluation to make sure they put the right planet on the other end of the wire. It was a good brain exercise.
After we got it up and hung it from the kitchen light, it was noted that Saturn had no rings. Using aluminum foil, some rings were fashioned and placed on Saturn so that it was more accurate.
All in all it was a fun and fairly simple way to review the placement of the planets.