CHALLENGE: What is this thing? [SOLVED]
![](https://lemmy.world/pictrs/image/d4a4abe6-aa80-4d50-96db-00ddb6932f74.jpeg)
![](https://lemmy.world/pictrs/image/675b216b-6fb3-402d-bee6-760e36a1b8db.png)
![](https://forkk.me/pictrs/image/55bcb94a-a582-4f2b-a0bb-fa7a3d94587f.jpeg?format=jpg&thumbnail=256)
Two white plastic discs that rotate freely, each with two semicircular arms which again rotate freely.
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Two white plastic discs that rotate freely, each with two semicircular arms which again rotate freely.
More pictures: