The Week 1 Lesson is about Family Prayer, and gives the suggestion to invite children to "share something he or she might thank or ask Heavenly Father for in family prayer."
The children already know so many wonderful songs about prayer, why not combine the sharing time and singing time lessons to help emphasize this point.
Use the wonderful resources in the LDS Media Library on the topic of prayer to print out a picture, to cut up like a puzzle.
The list of https://www.lds.org/children/resources/topics/family-prayer
“When I was a little child, my parents taught me by example to pray. I began with a picture in my mind of Heavenly Father being far away. As I have matured, my experience with prayer has changed. The picture in my mind has become one of a Heavenly Father who is close by, who is bathed in a bright light, and who knows me perfectly.”
We can pray each morning to recognize opportunities to serve others. “Heavenly Father will guide you, and angels will assist you,” said David L. Beck, Young Men general president. “You will be given power to bless lives and rescue souls.”3 -- (June 2014 visiting teaching message)
“Successful … families are established and maintained on principles of faith, prayer, repentance, forgiveness, respect, love, compassion, work, and wholesome recreational activities.” (Prayer, LDS.org)
“The Savior told us, ‘Pray in your families unto the Father, always in my name” (3 Nephi 18:21). In our day, the Church urges us to have family prayer every night and every morning. … Family prayer is a powerful and sustaining influence [a long-lasting power to help us change for good]. – President James E. Faust, April 2002 General Conference (1920-2007)
(Write down song titles from the various prayer songs listed above.)
Finish the sentence. "I'll seek the Lord _______ while in my _______"