Amazingly, the yo-yo has been around since 500 B.C (!), samples from ancient Greece are available in several musea around the world. There are plenty of online resources available that can tell you more about the history of the yo-yo, as well as a multitude of yo-yo collections sites. One of the best we could find is The Museum of Yo-Yo history. Check it out, it's worth it. Books about yo-yo collecting and history are scarce, but there are a couple available at your favorite online retailers.
The Seattle Space Needle yo-yo is rare. It is a 1962 Seattle World Fair souvenir, and it has a very distinct and unique shape, with each of the two halves being modeled after the Space Needle tower in Seattle. With most yo-yo's being plain shaped, the modeling of this sample makes it special. Added to it being a World Fair souvenir (another collecting niche) makes for a desirable collectible.







