What items dont sink in the water?

Question

I recently got the shimmer swimmer and turned it into a shimmer ball to have it in the private beach I have in my house which made me think.

What items besides shimmer swimmer wont sink into the depths of the water and go missing for ever?

Comments

So the Shimmer Ball can be placed over the water? That is not because it is a private house?

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on swimmable water, yes just as the beach ball

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only swimmable water? Regular water makes it sink?

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i actually dont know if regular water makes them sink but since i have only confirmed swimmable water is why i said it like that

Answer 1

As far as I know, there are only two items that float on water (swimming zone) the Waterball and the Shimmer Ball.