New from Tommy Nelson is the Bedtime Devotions with Jesus book. There are a year's worth of devotions in this book, written by pastors and church leaders from all over America. If you are wanting to get your little one used to spending time in God's word, this is a great place to start.
Each page is a different topic and they are written at a level in which even the youngest of children will understand.
What I love about this is that the truth of God's word is so simple but even the parents need reminded of certain things. I think I may benefit as much as the child when reading this.