Brown Bear, Brown Bear, What Do You See? by Bill Martin Jr. and Eric Carle is a popular book to use for story-book based preschool theme. Children love this story and there are plenty of topics that you can cover with this classic book.
One of the topic that you can cover is beginning sounds of the animals in the book. I have created a simple phonic worksheet suitable for kindergarten level to review the beginning sounds of all the animals found in the story.