A baby can typically start sitting in a high chair once they are able to sit upright on their own and eat solid food, which usually happens between 4 and 6 months old. Key readiness signs include good head control and stability, the ability to maintain an upright posture with straight shoulders, and being able to hold their arms free to grab food or other items. Babies need strong enough neck muscles to support their head, which usually develops around this 4 to 6 months age range. Some high chairs have reclining positions suitable for younger babies, but traditional high chairs are best used when the baby can sit unsupported. Safety considerations include always using the chair's safety harness to prevent standing or falls and placing the chair on a stable surface away from hazards. In summary, most babies are ready for a high chair when they can sit up independently, usually around 4-6 months, but this can vary by individual development.
