Sign of the cross facts for kids
In the Catholic tradition, the right hand goes from the forehead, to the chest, and then to the left and right shoulders (the order of shoulders does not matter). This is sometimes done while saying "Father, Son, Holy Spirit."
In the Orthodox tradition, the tips of the thumb and the middle and index fingers are put together, and the ring finger and little finger are put against the palm. The first three fingers are for faith in the Trinity, and the other two fingers are for the two natures of Jesus, divine and human.
Images for kids
Orthodox Christians (among them then-president of Russia Dmitry Medvedev) making the sign of the cross at the funeral of Patriarch Alexy II
Position of the fingers while making the sign of the cross as currently preserved in the Eastern Orthodox Church although originating in the western tradition
Position of the fingers used by Old Believers while making the sign of the cross
Sign of the cross Facts for Kids. Kiddle Encyclopedia.