Hauling a Pumpkin: Wheels and Axles vs. Lever: First Step Nonfiction - Simple Machines to the Rescue

Which works better to haul a pumpkin--a lever or wheels and axles? Readers will see how a group of kids compares two simple machines and decides which one does a better job at moving the pumpkin. This book supports engineering design standards for primary grades in the Next Generation Science Standards.