One of my favorites. 

A ball that looks like a ball that someone would draw. 

At first glance the ball looks pretty normal. But upon closer inspection you'll realize that every one of the 32 panels on the ball is a unique shape, and the ball looks peculiar. 

Interestingly, making a ball that looks like this is much more complicated than making a ball that looks good and even. For a standard ball there's only 1 variable (how long do you make each edge?). For this ball, every panel is unique. 

Making changes to the shapes of a panel has a cascading effect and every other panel needs to be adjusted to compensate. Every panel has a specific place, and if any mistake is made during the stitching phase the ball wont come together.