Thank you cypher. It's difficult to know really. It just got me a bit worried when I saw that video. I'm not sure what the health risk is with the tiny friends sand. It's certainly a grey colour the one I've got, so I don't really know what to think.
I've looked for children's play sand and managed to find a smaller bag of 5kg (everywhere else is 15kg!) Is this one ok?
Play sand.