June 6 is National Yo-Yo Day, celebrated each year since 1990. Did you know that yo-yo’s have been around for about 2,000 years, first played with in ancient Greece? Modern yo-yo’s were popularized in the Philippines, with the word “yo-yo” first appearing in a Filipino dictionary in 1860. They became popular in the 1930s, with the best known yo-yo’s produced by the Duncan Toys Company (1929-) in Middlefield, Ohio. Early yo-yo’s were wooden and often had colorful graphics. A Hi-Ker Spin Master wooden yo-yo from the 1950s is $35 on eBay.
If collecting vintage yo-yo’s here are some tips, according to YoYoMuseum.com: