Kayson was a yo-yo manufacturer for the late 1930's to the 1940's. Kayson manufactured only one model, the Genuine Streamline Top, a 3 piece wooden yo-yo with a fixed string and a simple logo decal. The yo-yo was available in a variety of colours, including less attractive colours like army green and lavender. As with all models from this era, the Kayson yo-yos are sought-after collector's items, fetching high prices on sites like eBay.