Laura,
can you say more about how
We would then use a flashlight in a darkened room to simulate how stars twinkle in the night sky. This visual representation will help to solidify their learning and makes the concept more tangible.
would show stars twinkling? The demonstration I have come across for stars twinkling (which is an atmospheric phenomena) is very much for upper second level since it deals with refraction:
https://stardate.org/teaching-tool/hot-air
For vivid images I would suggest Astronomy Picture of the Day (which we meet in Module 4) – have you other sources you would use?