F uses a trycicle for some months but he learned to pedal just one month ago. Before, he used the trycicle without pedals, simply using his foot to push himself. He became very fast in this and I think it helped to understand the mechanism of riding. Then for Easter my mil gave him a bike with training wheels and after one day he immediately learned. He was really motivated because he really likes bikes and riding, so this helped I think. From that moment he also started pedaling on the trycicle.