Otiosities are things that are not important or useful, but are interesting or enjoyable.
Otiosities are usually fun or interesting things that you do when you have free time.
Examples:
She collects little otiosities like shells and rocks.
We spent the afternoon looking at the otiosities in the museum.
He likes to fill his room with otiosities.
The store sells all kinds of otiosities, like funny toys and strange books.
Her house is full of otiosities from her travels around the world.
The otiosities in the shop window caught my eye.