First of all, pay attention to the age and height of the child, as most bicycle models are classified according to these criteria and the diameter of their wheels and the height of the bicycle itself differ. It is also worth noting whether the bike has a built-in dirt protection (because children rarely pay attention to where they ride and scores and dirt is not avoidable) and whether it is comfortable for the child (the child should try different models to ride on it, shift gears, brake or evaluate the most suitable bike size in general).