The Fort on Fourth Street: A Story About the Six Simple Machines (Arbordale Collection)

When a young child decides to build a fort in the backyard, Grandpa comes forward to help. But they can’t do it alone―they get help from the six simple machines: lever, pulley, inclined plane, wheel and axle, screw, and wedge. Told in cumulative rhyme, similar to The House That Jack Built, readers follow the building process to completion and discover the surprise reason it was built.

Lois Spangler is an accomplished author and educator who has received many distinguished awards for her classroom work during her 32-year career. In addition to her personal achievements, she has worked with students to help them earn both state and national awards from numerous organizations including NASA, Toshiba and the NSTA. Although The Fort on Fourth Street is Lois's debut picture book, she has written, edited and managed more than 30 books including 6 ancillary science books for Scott Foresman Science. As an author and education expert, she has served on various committees and boards, including as a judge for the NSTA's ExploraVision National Science Competition and the NSF's Selection Committee for the "PAEMST."

In addition to Cash Kat, Christina Wald has illustrated Fibonacci Zoo, A Cool Summer Tail, A Warm Winter Tail, Habitat Spy, Little Red Bat, and Henry the Impatient Heron for Arbordale. She also enjoys illustrating a wide variety of toys, games, books, and magazines. From a book that featured hundreds of animals on each page (Look, Find, and Learn: Animals of the World) to games including the Star Wars role playing game series, every assignment covers something new and exciting. In recent years, she has illustrated tons of different animals for books and other publications. Christina enjoys the research aspect of such projects, saying that each new book is a fascinating new learning experience. She often integrates travel to research for her illustrations. She lives in Ohio with her husband and three cats.