This is one of a series of picture-books with a question-and-answer format. The topics move from the child's immediate surroundings - the body and everyday things in and around the home - out into the wider world of animals, plants, the Earth and beyond, into outer space. Each book has eight project boxes, with things to make and do. Focusing on wings, wheels and sails, this book has 35 major questions covering the main topics, with answers to a further 100 questions given in boxes on each spread.