Gather a number of communication visual aids (some may need to be photographs) such as a letter or postcard, a walkie-talkie, an old telephone with a cord, a radio, a computer, a cell phone, a picture of telegraph, etc. Place them on a table and board at the front of the room. Write the scripture references below on six strips of paper. Have blank papers and crayons or markers available.
Show the children the display of items/pictures at the front of the room. Tell them that all of these things can be used for the same thing. Have the children guess what that is. Let them guess until they figure out that all of them can be used to get messages from one person to another.
Explain to the children that there is someone you can communicate with, without using any of these items. That person is Heavenly Father. You can talk to him whenever you need to, just by saying a prayer.
Tell the children they are going to help each other learn more about prayer. Divide the children into six groups. Make sure a teacher or other leader is in each group. Give each group one of the scripture references. Let them take a few minutes to read the scripture and create a simple drawing that shows what that scripture teaches us about prayer (who, when, or where).
Let each group present their picture and explain their scripture.
3 Nephi 18:21. Pray in your families unto the Father, always in my name, that your wives and your children may be blessed.
Matthew 6:6. But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly.
1 Nephi 16:32. Now when they beheld that I had obtained food, how great was their joy! And it came to pass that they did humble themselves before the Lord, and did give thanks unto him.
Psalms 55:16-17. As for me, I will call upon God; and the Lord shall save me. Evening, and morning, and at noon, will I pray, and cry aloud: and he shall hear my voice.
Matthew 21:13. And said unto them, It is written, My house shall be called the house of prayer.
Alma 34:19-20. Yea, humble yourselves, and continue in prayer unto him. Cry unto him when ye are in your fields, yea, over all your flocks.
After all the groups have presented their scripture and drawing, reinforce the messages taught and bear your testimony of prayer.