Flaps to lift on every page reveal what goes on inside a computer, how coding works and how computers talk to each other across the internet. The principles of coding, from simple commands to algorithms, are explained with a treasure hunt game and puzzles, and there are examples of programs in the coding language Scratch ™. Includes internet links to specially selected websites where children can discover more coding ideas, tips and games. Computer coding is now a compulsory topic on the UK National Curriculum for primary schools, and children learn to create and debug simple programs at Key Stage 1.