Recommended for children aged 5+, Do You Know? is a series of levelled non-fiction books featuring video content, project work and critical-thinking activities. Each book asks a range of BIG questions, developing children's language, communication and investigation skills. This Level 3 Reader is A1+ in the CEFR framework and supports YLE Movers exams. The longer text is made up of sentences with up to three clauses, some expression of future meaning, comparisons, contractions and relative clauses. How do we make electricity? Can a potato be a battery? Find out more about circuits, transistors and batteries.