This is great! From the NY Times:
For everyone who finds mathematics incomprehensible, boring, pointless, or all of the above, Glen Whitney wants to prove you wrong.
He believes that tens of thousands of visitors will flock to his Museum of Mathematics, to open in Manhattan next year, and leave invigorated about geometry, numbers and many more mathematical notions.
“We want to expose the breadth and the beauty of mathematics,” said Mr. Whitney, a former math professor who parlayed his quantitative skills into a job at a Long Island hedge fund. He quit in late 2008 with connections to deep pockets and a quest to make math fun and cool.
Two years ago, he and his team built a carnival-like traveling exhibit called the Math Midway, a proof-of-concept for the coming museum. It includes a tricycle with square wheels of different sizes that visitors can ride smoothly around a circular path ridged like a flower’s petals. An accompanying sign explains why: The undulating circular surface rises and falls exactly to offset the odd shape of the wheels, so that the tricycle’s axles — and the rider — remain at the same height as they move.
Here’s LadyAda on said tricycle: