Opal Dunn is widely known as a specialist in books on early first and second language development. She has been a consultant to the Council of Europe on children's bilingual education. She has been shortlisted for the Eleanor Farjeon award for services to children's literature and in 2008 received the Japanese Order of the Rising Sun for over 30 years work with bilingual Japanese children. Opal's books include Acker Backa Boo, El Gato Leo Goes to School, El Gato Leo Comes to Play, Leo le Chat Goes to School, Leo le Chat Comes to Play, Hippety-hop, Hippety-hay, Un Deux Trois and Number Rhymes to Say and Play. She lives in South London. PATRICE AGGS was born in Michigan and moved to London in 1974 to study Fine Art at the City and Guilds Art School. Patrice has illustrated over 20 books.