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According to wikipedia, "A Roald Dahl Treasury" is his only collection of short stories for children; looking at a few of them, "The Enormous Crocodile" has a scene that takes place in a "funfair", so maybe that's it?
That's not it, but thank you for trying. The illustration on the first page is if I remember correctly sketched cotton candy.
It could have been Tales of the Unexpected, but I am not entirely sure.
Is it Eating Candyfloss Upside Down? [1]
The title seems to fit, and there's a Quentin Blake drawing on the front, which would explain why you are thinking of Roald Dahl.
That might be it, I will look into it, thanks!
It is Helter Skelter by Gillian Cross from that book. Thank you so much. It is nice that least some are courteous enough to respond.
I read this in my library, but it was one of those "for sale" books. It was a collection of Roald Dahl stories, perhaps stories from writers similar to him, for young readers. I remember reading this around 2006, but I think the story was from the 60s-80s when Roald Dahl was still pretty popular. All I remember was a circus. A child, I think it was a boy (maybe girl) was eating cotton candy, or perhaps something minty, and he/she felt as if his/her head was flying, maybe it was spinning. That is all I can remember, does anyone know what I am talking about? Thanks.