Nach Preis einkaufen. It is based on Oxford Reading Tree which is used in 80% of primary schools. This Read with Biff, Chip and Kipper Level 1 Collection is great value, containing 4 books in 1! Level 1 Phonics practise sounds and letters, just as children learn to do in school, with the help of Biff, Chip, Kipper and Floppy.