Hi Mairead,
thanks for sharing your space fact- I had thought it was just to do with the gases in the atmosphere- so looked it up!
https://www.rmg.co.uk/stories/topics/15-awe-inspiring-astronomy-discoveries
I like the way you have extended the very pretty skittles activity to explore different liquids. That nicely ties into Materials>Materials and Change >explore the effects of water on a variety of materials and the careful observations even access parts of Light > dark and bright colours and different shades of colour.
I had read a while ago that gender affects colour naming, it has been established that from a young age girls name colours better. See this article: https://www.researchgate.net/publication/258831976_Gender_differences_in_colour_naming
have you noticed that?