The Level 2 pack contains 36 books, six of each of the following titles: The Big Picnic, Grow Me a Picnic, A Den in the Wood, Dens and Nests, Cards for Gran, Frog Cards. Oxford Reading Tree Explore with Biff, Chip and Kipper is a series of paired fiction and non-fiction books linked by curriculum-related topics that children will be learning about in the classroom.