Features: Sensory Enhancement Design: Classic Yo Yo game with durable alloy, encourage and enhance children's senses, exercise their hand use and stimulate their basic hand & eyes coordination and fine motor skill training. Selected Qualification Materials: Made of qualified solid aluminum alloy, and non-toxic painted, round and polished without burr, wear-resistance, durable metal to improve the for play experience. Stimulation Function: Flat bearing design make the toy easy to return and for play, stimulate kids desire to explore, handhold controlling ability, the colorful metal ball can well attract their focusing attention. Educational Training: With good stimulation to educational training for kids, improve their abilities of grasping, balance controlling skills and further brain development. Best Choice for Kids: Suitable for kids as birthday gifts, Christmas gifts, and encourage them free to explore and evoke their sport & competitive abilities. Specifications: Product Dimension: approx. 5.5 for cm/2.17 inch Material: Aluminum Alloy Color: Random Delivery (If you buy more than one, colors you receive will be same or different.) Net Weight: 32g/0.07 lbs Note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1Set Classic Yo Yo Toy