Empujar Y Jalar (Push and Pull) (Mi primer paso al mundo real - Fuerzas y movimiento / First Step Nonfiction - Forces and Motion) - Tapa blanda

What is a pulley? A push or pull is a force that makes something move, or stops it from moving. Explore the power of a simple push in this informative book.

Robin Nelson's careers have always kept her surrounded by books--as an elementary teacher, working at a publishing company, and now working as a school library media specialist. But her favorite job is writing books for kids. She has written many nonfiction books for children. She lives with her family in Minneapolis.