Here in the Netherlands kids learn to ride a bike on little two wheeled wooden bikes, that they start to “glide” on. It’s a nice system that gets them right into learning how a real bike behaves.
I've heard people say that even when teaching adults to ride a bike, it's best to have them just push themselves by their feet (as you would on a balance bike) until they learn how the bike moves, then tell them to use the pedals whenever they feel ready.