A oloid is a shape discovered by Paul Schatz in 1929. It's unique shape makes it roll in a unique way, even though it looks like it wasn't supposed to!

Please make sure to glue the 2 separate pieces together in the correct way, otherwise it will look different from the picture and will not roll.

Note: For those who have seen my original upload on MakerWorld, I apologize for any inconveniences caused. I deleted it on December 16th 2025 after it was removed from the exclusive program on December 14th 2025 due to insufficient complexity and sophistication.
This gave me a chance to reupload it on Thingiverse and Printables, but unfortunately the original upload is deemed a total loss.
On December 19th 2025, I finally decided to reupload it over here.