For your toddler, use Welcome to Alphabet Harbor! as a picture book and gradually introduce all of the Harbor Friends. Depending on their attention span, introduce Active A, Boy B and Clever C in one setting. Then, continue adding two Friends while reviewing the previous ones.
As your child becomes confident with the names, begin reading their descriptions. If your child shows more interest in Boy B, read about him. So let your child choose until all of the Harbor Friends have been read (and reread) and are fast becoming their reading buddies. Remember, each time your child repeats the Friends' names they are learning the letters' sounds - the 40 sounds they will need to know before they begin to read.