Ruby Goldberg's bright idea / Anna Humphrey ; illustrated by Vanessa Brantley Newton.

Author: Humphrey, Anna, author.

Physical Description131 pages : illustrations ; 22 cm

Note: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.

Audience:Ages 8-12.

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