Cambridge International Children's English Kid's Box is a set of zero point English textbooks published by Cambridge University Press specifically for children aged 5-12 in non English speaking countries. It was co written by Caroline Nixon and Michael Tomlinson, international English teaching experts with over 20 years of experience in teaching children's English. The latest version is currently the second version. Cambridge International Children's English Kid's Box is the Cambridge International Children's English corresponding to the YLE test under the ESOL examination department system of the Cambridge University Examinations Authority. The Cambridge system is ultimately directly connected to the Cambridge General Test Band 5 and IELTS exams.