To help the children learn "I Know That My Savior Loves Me" (pages 28–29 of this outline), consider the following:

Show a picture of the Savior blessing the Nephite children, and tell the children the story found in 3 Nephi 17:11–24 in your own words.

Sing the first line of the song to the children, and include an action to go with the phrase "beautiful place" (such as spreading your arms wide).
Have the children sing and do the action with you. Invite the children to think of actions to go with each line of the song.
Then sing and do the actions together.