You could also choose to read stories from The Rhyme Bible (published by Gold 'n' Honey Books) in addition to the Psalms selections.  The stories are short and the rhythmical language will appeal to babies. 

For the first four lessons you will notice that I have chosen one story, the remaining lessons (except the last) have two story selections.  This is due to the number of chapters in the book.  Repeat the story to your baby daily.  The second week of the lesson plan you can share the second story choice, where there is one.