Manufacturers generally recommend changing the string after about 30 minutes of play time, or if the string becomes frayed. Non-bearing yo-yos will wear out the string quicker. MagicYoyo yo yo String Multi-color, 10 Pieces, 25 Pieces,100 Pieces optional Features: Made of 100% polyester material, durable and comfortable. Rainbow color. Compatible wi..

Please attach the yoyo string according to the instructions, DO NOT TAKE THE YOYO APART! Features:1. It is not only for daily entertainment, but also for acrobatic performance with most entertaining fancy 2. Designed to train fine motor skills and eye-hand coordination 3. It can cultivate the imagination, creativity and rapid reactionability 4. A t..