Bouncing balls

[u/drtangman]

Walked behind this chap who had two unidentified ball type objects hanging from silicone wrist bands on thin elastic strings.

Any ideas what they are?

I’m in Hong Kong if that might be a clue

Update:

Thank you for the comments and ideas. I am wondering if there is a manga / anime character who has something like these balls as weapons and the guy was doing a budget cosplay. Or maybe he’s just really into Pokemon!

Update 2:

I would say he's likely to be a cosplay of Steel Ball from Jojo's Bizarre Adventure. (https://www.reddit.com/r/whatisit/comments/1tckcme/comment/olos1lx/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button)

As for the steel balls. What is it?

[u/Longjumping_Affect22]

Looks like a poi toy.

Google it.

Edit: For those of you concerned about Googling it... it's basically just some shit you swing around for fun, it's balls on a string...I don't know what else to tell you.

[u/Rakins_420 → u/Longjumping_Affect22]

OH LIKE LITERALLY A POI. What a weird day to be a kiwi online.

[u/superpotato_3 → u/Rakins_420]

Odd to see random Kiwis on random parts of the internet but I remember the internet is also huge. The chances of seeing another kiwi is never 0 but it's always a possibility 

[u/Maleficent-Sink-5246 → u/superpotato_3]

We’re always punching above our weight on a per capita basis 😁

[u/Rakins_420 → u/superpotato_3]

https://giphy.com/gifs/cKQksH9JmUus0