Check the listing for details. Kids Duncan yoyo. Condition: New. Listed at 6.99 USD. The Duncan YoYo is a classic toy that has been around since the 1970s. Known for its quality and durability, Duncan yo-yos are popular among enthusiasts and collectors alike. With a focus on simplicity and functionality, these yo-yos are designed to provide hours of entertainment for people of all ages. Whether you're a beginner looking to learn how to yo-yo or a seasoned pro looking for a high-quality Duncan yo-yo, this product is sure to meet your needs.