Luke 10:21

At that time Jesus, full of joy through the Holy Spirit, said, "I praise you, Father, Lord of heaven and earth, because you have hidden these things from the wise and learned, and revealed them to little children."

Chi Ro = one of the earliest symbols to describe Christ, taken from the first two letters of the Greek word for "Christ," Χριστός

Amanda Bourman's "Chi Ro" and
Mackenzie Olson's (2 yrs old) expressive gesture.