- Kid"s Box is a six-level course for young learners. Bursting with bright ideas to inspire both teachers and students, Kid"s Box gives children a confident start to learning English. It also fully covers the syllabus for the Cambridge Young Learners English (YLE) tests.The Teacher’s Book contains comprehensive notes, as well as extra activities and classroom ideas to inspire both teacher and students.Level 6 completes the Flyers cycle (CEF level A2).