Ruby Goldberg's bright idea
Ruby is determined to win the gold with her fifth-grade science fair project, a Rube Goldberg machine to help her grandfather, but the real prize turns out to be something completely unexpected.
Ruby is determined to win the gold with her fifth-grade science fair project, a Rube Goldberg machine to help her grandfather, but the real prize turns out to be something completely unexpected.
Simon & Schuster, Incorporated · inglés · ISBN 9781484446492
inglés · ISBN 9781442480278
Simon & Schuster, Limited · inglés · ISBN 9781442480315
