Segway Unisex-Child Ninebot S Kids From size to material selection, the Ninebot Kids is optimized for children, giving them the best riding experience. The ninebot kids deliver a speed of up to 8.7 mph, a max range of 8 miles. Recommended age is 8+years old. 15-fold safety assurance technology strictly selects global high-quality components-4 rigorous tests given, 4 types of smart voice reminders, 4 smart protection mechanisms, and 3 core high-standard components. Real-time intelligent voice safety reminder.