Ha ha! I have so many half started stories! Actually, I realised it is heavily 'influenced' by a story I read (and watched as a kid) by Roald Dahl (The writer of Chalie and the Chocolate Factory). He wrote a collection of short stories called Tales of the Unexpected, which was later turned into a TV series. One of them is very similar to what I wrote:
https://www.imdb.com/title/tt0717493/