A beautifully illustrated picture book introducing young children to the concept of forces.Bird is building her nest. She pushes and pulls twigs into place until she''s made a cosy cup, ready and waiting ... can you guess what for? This beautiful picture book is the perfect introduction to forces and the concept of pushing and pulling, and is the third in the new Science Story Book series from Walker Books. Bird Builds a Nest is illustrated by up-and-coming talent Richard Jones and written by author Martin Jenkins, the award-winning author of Can We Save the Tiger? and Ape.