Duncan YoYo Kit - Imperial Red Yo-Yo, Multi-Color Yo-Yo String 5 Pack, and Yo-Yo Trick Book. The imperial yo-yo is great for beginners learning basic string tricks. Featuring a narrow string gap, steel axle, and durable plastic body. String multi-pack contains 5 replacement strings in assorted colors. Strings are made of 100% cotton. Yo-yo trick book has over 660 tricks. Includes bonus free hand section. Good old fashioned fun for kids and adults alike.