Stellarium
Stellarium:
Creating a Solar System with real planets gives us the possibility to work about astronomy but also... Mythology! We can explain why the planets got their names (Roman mythology).
If we can have a constellations machine (that projects the stars on the ceiling) we can tell stories from Greek mythology.
We can introduce also stories like "The Little Prince", or work about using maps "Walking in the Moon"...
The possibilities are infinite as the Universe.