Of the five practices of a Bodhisattva – saint practice, Brama practice, nature practice, child practice, and sickness practice – Child practice is to practice with the inquisitive excitement of a child exploring and understanding their world. The child when it learns and explores is open to all sorts of possibilities and does not have preconditions for understanding. The child approaches life with unbridled excitement and constant questing for understanding. As we practice Buddhism, especially if we have been doing it a long time, we can loose that childlike wonder and excitement.
Lecture on the Lotus Sutra