[4 IN 1 KIDS BIKE TRAINER DESIGN]: Easy switches among balance bike, auxiliary balance bike, bicycle, tricycle, pedals, and training wheels can be installed or removed according to your needs. It is the best choice as your child’s outdoor companion all along. [EASY TO USE]: Tool-free assembly and disassembly, only to install the handlebar, pedals, and training wheels, which comes with 3 red buttons, no tool is required to avoid the troubles during the installation process. [ADJUSTABLE HEIGHT]: The saddle height is adjustable to suit growing kids, saddle height from 13 to 15.7 inches, the max loading 110 lb, which makes it become a long companionship to your little one from 18 months to 5 years. [TOUGH & DURABLE]: This carbon steel frame training bike is equipped with puncture-proof flat-free EVA foam tires, no need to ever inflate these tires, which extends the life of the bicycle. It's the perfect birthday present or Christmas gift for healthy outdoor fun. [SAFETY GUARANTEE ]: Our kids' balance bike has passed the safety testings required, all the materials and design are safe for kids, please feel assured to order it. NOTE: If you have any questions, please contact us as soon as possible, we will try our best to solve your problem and give you a satisfactory solution. Amazon price-$67.99 my price $50. Now $40