I have come to love this book!
It starts with a little girl having bedtime worship, and the girl realizes she can talk to God all the time. The next day she goes through a number of different situations where she realizes, "that's when I can talk to God."
The book covers praise, thanksgiving, confession, requests of different types, when God answers a prayer, praying for others to know Jesus, disobedience and confession. The book ends with discussing how God talks back to us.
It is excellent in my opinion! Now when our two-year-old hears sirens she wants to pray for the people. Two-year-old children can understand the material, but this book is appropriate for much older children too.