As the scripture reveals, Jesus spent time in prayer. He taught others how to pray.
Parents are the best teachers when modeling effective prayer.
God is a loving Father, He is a friend, He cares about every aspect of a person's life. Talk to Him like you would talk to a person who had these traits. Children need to see you praying and sharing about answer to prayer in your life. Children often have a friend or family member to who they go when something bad happens. Yet, the person they trust may be the one with whom the child is having a struggle.