How do we make bridges? Do animals have bridges? Find out more about the science of building bridges, big and small. Do You Know? is a series of levelled non-fiction books featuring video content, project work and critical-thinking activities to motivate and engage young learners. Covering a range of STEM topics, Do You Know? takes an enquiry-based approach, developing children's language, communication and investigation skills. PreK-Grade 1. Paperback.