Regarding parents, what they care about most is the smooth growth of their children. They are afraid of being over-injured and losing confidence, but at the same time they have to let them try. In the memory of teaching children to ride a bicycle, I hope to learn how to rely on their own strength and learn to grasp the opportunity. Just like every day in the past, when a child came to the park with a child, when the child shouted "Don't let go," while the parents, who didn't know that they had let go, were watching his success from behind.