These are the props I used this summer, when doing constellation programs at some local libraries.
We did a quick review of what a constellation is and then I started to "quiz" them.
First, I showed them a picture of some stars and they had to decide what picture they might see in those stars.
At that point I shared some of the stories associated with each of the constellations. We incorporated as many different culture's variations on the myths and legends as I could find, which helped the children understand that the people making up the stories were using images and themes that were part of their everyday life.
We also discussed the great use of imagination in some of the constellations. It was a good reminder that we were talking about groups of people for whom this was a form of evening entertainment - there weren't televisions or computers or iPods available. There weren't even books readily available to some of these groups of people.
Here's another set: