RECOMMENDED AGES: 12 Month - 3 years old. We recommend 12-24 months baby to use three-wheel mode. 2-3 years old baby uses two-wheel balance bike mode. Best 3 in 1 design tricycle and balance bike for baby,EASY TO ASSEMBLE: Our baby bike just need to install the handlebar and seat within minutes. Compared with other tricycles, XJD tricycle has an additional adjustment of the handlebars, lift seat function, and adjusts the handle angle and seat height(adjustable from 11.8 inch to 14.2 inch),STURDY AND COMFORTABLE: Trikes for toddler has safety carbon steel frame, durable widen silent wheels, strong enough for riding indoor or outdoor. Soft handle grips and seat make kids' comfortable riding,LEARN TO STEER: Our toddler bike is the best birthday present for baby to learn how to ride a bike. Excellent indoor baby walker toy develops kids balance and helps kids gain balance, steering, coordination, and confidence at an early age,SAFE AND RELIABLE: XJD kids tricycle has been passed safety testings required, all the materials and design are safe for kids, please feel assured to choose. XJD aims to supply high-quality products, if you are not satisfied with our bike, please feel free to contact us