First introduced in 1954, this yo-yo is based on the original Duncan wooden tournament model. The center weight is perfect for looping. It is the best selling shape. The fixed axle ensures responsive performance for many tricks. The Duncan yo-yo is perfect for children's dexterity, balance and coordination, and is also a great item for travel. It is something to do during breaks when you stop the car, and it is great to use at your destination. It is also relaxing. The yo-yo, a classic toy that continues to be a favorite, can help build children's self-esteem, and it can improve their ability to concentrate.