Jesus Christ came to earth as promised by the prophets
CSMP-booklet 2010 pg 24

Ask the children: “Think of a time you celebrated your birthday in a special way. What did you do?”
Allow a few children to talk about their birthdays.

Explain that Heavenly Father had His prophets tell the world, from the beginning of time, about the most important birth in the history of the world—the birth of His Son, Jesus Christ. Explain that this message was so important that prophets were willing to give their lives to testify that Christ would come. Have the children repeat the phrase “Jesus Christ came to earth as promised by the prophets.”

Display pictures of a few prophets who taught that Jesus Christ would come. Divide the children into groups and give each group a scripture reference that describes an account of one of the prophet’s teachings. Have the groups take turns dramatizing the accounts (see TNGC, 165–66) while the rest of the Primary identifies which prophet they are portraying.
Prophets could include

Testify that Jesus Christ did come to the earth and the prophecies concerning Him were fulfilled.