The Bunzi gradual balance bike is a unique 2-in-1 balance bike that can be switched between 3-wheel mode and 2-wheel mode in just a few seconds. Start off in 3-wheel mode from as early as 1 year and switch to 2-wheel mode only when your child is ready. Switch back and forth as many times as you want. The seat position in 3-wheel mode is low to the ground for comfort; the seat position in 2-wheel mode is higher to make more speed. The Bunzi is light and easy to carry by the handgrip and has a nice little cookie storage trunk in the seat.