4-in-1 Activity Walker: This baby walker can be easily converted from seated activity walker into the walk-behind walker in seconds, suitable for accompanying your baby’s growth from 6 months old. And the detachable toy tray provides you with an extra dining chair, one car for multipurpose and fulfilling the baby’s activity needs in the early phases. Two Optional Scientific Walker Modes: Two optional modes-seated and push way conduct baby to move forward and develop the leg muscles through scientific guidance so as to effectively avoid bow-legged walking. And the breathable and detachable seat can be adjusted in 3 positions for babies in different height. Detachable Toy Tray: Attached toy tray includes familiar melodies, sparkling lights and a cute microphone, an attractive activity center to baby's attention. And the removable toy tray provides a large dinner plate for collecting food, perfect dining zone for babies. Anti-rollover U-shaped Base: Different from the circular base which will let baby disorientate and giddy, the wide u-shaped base can bring complete psychological hints of direction and won’t easily turn over. The four directional wheels are retractable when it’s in dining and playing modes. Relieved Safe Material: Made of the ABS and PP material, this sit-to-stand baby walker is durable and stable enough for long-time use. And it has been certified with ASTM, BPA free, relieving parent’s worry. And the surface of the whole body adopts burr-free and angularity-free processing.