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Lanzamientos por Bob Friedhoffer

Cover for Bob Friedhoffer · Scientific American, Simple Science Fair Projects, Grades 3-5 (Paperback Book) (2018)

Scientific American, Simple Scie... (2018)

Bob Friedhoffer

Cover for Bob Friedhoffer · Scientific American, Winning Science Fair Projects, Grades 5-7 (Paperback Book) (2017)

Scientific American, Winning Sci... (2017)

Bob Friedhoffer

Cover for Bob Friedhoffer · Simple Science Fair Projects - Scientific American Winning Science Fair Projects (Hardcover Book) (2006)

Simple Science Fair Projects - S... (2006)

Bob Friedhoffer

Cover for Bob Friedhoffer · More Simple Science Fair Projects - Scientific American Winning Science Fair Projects (Hardcover Book) (2006)

More Simple Science Fair Project... (2006)

Bob Friedhoffer

Cover for Bob Friedhoffer · Winning Science Fair Projects - Scientific American Winning Science Fair Projects (Hardcover Book) (2006)

Winning Science Fair Projects - ... (2006)

Bob Friedhoffer

Cover for Bob Friedhoffer · More Winning Science Fair Projects - Scientific American Winning Science Fair Projects (Hardcover Book) (2006)

More Winning Science Fair Projec... (2006)

Bob Friedhoffer