Usually 12" to 16" wheels. Look for single-speed models to keep things simple.
Age is just a ballpark; height and inseam are your true north. how to buy a bike for a child
These start adding gears and hand brakes, mimicking adult mountain or road bikes. 4. Critical Quality & Safety Checks Usually 12" to 16" wheels
Younger kids (under 5) often use coaster brakes (pedal backward to stop) because they lack the hand strength for levers. For older kids, ensure hand levers are "short-reach" specifically for small hands. how to buy a bike for a child