"Use up spare parts or forgotten items from the garage to build your own miniature siege engine. Step-by-step instructions are used in this book to demonstrate basic engineering and physics skills for kids."--

Rob Ives is a former math and science teacher and now a designer and paper engineer living in Cumbria, UK. He creates science- and project-based children's books, including Paper Models that Rock! and Paper Automata. He specializes in character-based paper animations and all kinds of fun and fascinating science projects, and often visits schools to talk about design technology and demonstrate his models.