Grace,
When planning science inquiry it is good to reference the Framework for Inquiry that specifically deals with child lead inquiry science, where the children’s science understanding is shared, leading to a testable question.
So if children are playing with moon sand (https://www.bbcgoodfood.com/howto/guide/moon-sand) they might wonder ‘how long moon sand keeps its shape?’ They might ask ‘how much can you push moon sand before it crumples?’ A bit trickier to explain might be changing the recipe for moon sand and seeing does it change its properties.
If they build working rocket models, then they can explore forces, compare distance travelled and share those results.
With inquiry learning the children should improve their science content understanding by acting as scientists and testing their ideas.
And about the blood from space – I found this article that says probably not true.
