We’ve done this before, but I don’t think that matters!
I’ve picked these four objects pretty much at random. From left to right, they are a porcelain figure of a girl in, I suppose, 18th century costume (she’s actually one of a pair), a glass bowl, which came from Cornwall and reminds me of the sea, a small pottery receptacle made by one of my children at school, and a Coronation mug.
You are very welcome to use one of these, or (probably better) choose something of your own.
Start by carefully describing the object you’ve chosen - not in a sentence, but really thoroughly.
Then it’s up to you which way you take it. You can either use it as a prompt for memories and reflections, or you can put it into a story. If you go for a story, remember it needs to focus on a point where something changes in the life of the protagonist - and it would make sense for the object to be bound up in this.