John the Baptist is the baby who jumped for joy three weeks ago. Now he is grown up and lives in the wilderness, wearing clothes of camel hair and eating locusts (a kind of grasshopper) and wild honey (Matthew 3:4). His job was to help people get ready for Jesus: “Prepare ye the way of the Lord” (Matthew 3:3). He taught people to repent and baptized them in the Jordan River.
Then Jesus came to the river and asked John to baptize Him. Jesus never did anything wrong, but He was baptized to obey Heavenly Father and show us the way (Matthew 3:15). John baptized Him by immersion, all the way under the water, and Jesus “went up straightway out of the water” (Matthew 3:16). The heavens opened, and the Holy Ghost came down upon Him, with the sign of a dove. Heavenly Father’s voice said, “This is my beloved Son, in whom I am well pleased” (Matthew 3:17). Heavenly Father, Jesus and the Holy Ghost were all there, three separate beings.
For three-year-olds, the tiny truth is: Jesus was baptized, and I can follow Him. They may have seen an older brother, sister or cousin get baptized. Tell them that when they are eight, they can be baptized just like Jesus: by someone with the priesthood, all the way under the water. For now, they follow Jesus by being kind, praying and listening at church.
When talking about the dove, keep it accurate and simple: the dove was a sign that the Holy Ghost was there. The Holy Ghost did not turn into a bird. Heavenly Father’s words are read by the teacher, and no child plays Jesus or Heavenly Father. Jesus is the picture on your phone or tablet.