Wider Use Ages: 10 Month to 4 Years Old. This upgraded tricycle has an enlarged body size so that can be used for a wider range of ages. One besrey bike can meet your kid's all requirements at different ages, help your baby quickly learn to ride. The best first bike for your baby. Upgrade 5 IN 1: 1:Tricycle without pedals (learn to walk) 2: Baby walker without pedal (learn to walk stage 2) 3:Tricycle with pedals (learn to ride) 4: Baby walker with pedals (Learn to ride stage 2) 5: Balance bike without pedals (for sliding) Double Care: We specially adopted a Curved Carbon Steel Frame Structure + No Edges Design, which can buffer the transmission of vibration and vibration and minimize the risk of injury during riding, so as to better keep the safety of your baby. Easy to Install & Use: The structure frame is simple, just refer to the attached manual, you can easily assemble it in a few minutes. One click deformation, quick disassembly pedal allows kids easy to switch riding mode randomly. Sturdy & Safe: The sturdy carbon steel frame makes the tricycle stable and durable. The limited 120 steering of the non-slip armrests can prevent rollover, and the widened and completely enclosed wheels can prevent the baby's feet from being caught and slipping. Ensure full protection for children playing indoors or outdoors... Learn to Steer: Our Kids Tricycles can help children learn balance from an early age, improve physical coordination, and promote the development of children's arms and legs. At the same time, learning to ride a balance bike can encourage children to be independent and confident, which is the best gift your baby acquired from riding a bike