作者的書籍：Robert Friedhoffer - BookPine

Forces, Motion, and Energy

Forces, Motion, and Energy

Robert Friedhoffer

Sound

Sound

Robert Friedhoffer

Physics Lab in the Home

Physics Lab in the Home

Robert Friedhoffer

Physics Lab in a Housewares Store

Physics Lab in a Housewares Store

Robert Friedhoffer

Matter and Energy

Matter and Energy

Robert Friedhoffer

MAGNETISM and ELECTRICITY

MAGNETISM and ELECTRICITY

Robert Friedhoffer

Winning Science Fair Projects

Winning Science Fair Projects

Robert Friedhoffer

Simple Science Fair Projects

Simple Science Fair Projects

Robert Friedhoffer

More Winning Science Fair Projects (Grades 5 - 7)

More Winning Science Fair Projects (Grades 5 - 7)

Robert Friedhoffer

More Magic Tricks, Science Facts: The Madman of Magic

More Magic Tricks, Science Facts: The Madman of Magic

Robert Friedhoffer

Science Lab in a Supermarket

Science Lab in a Supermarket

Bob Friedhoffer

Old Magic Meets Today's Science: A Look at Scientific Recreations from the 1890s

Old Magic Meets Today's Science: A Look at Scientific Recreations from the 1890s

Robert Friedhoffer

Physics Lab in the Home

Physics Lab in the Home

Robert Friedhoffer

Science Lab in a Supermarket

Science Lab in a Supermarket

Robert Friedhoffer

Physics Lab in a Housewares Store

Physics Lab in a Housewares Store

Robert Friedhoffer

Magic and Perception: The Art and Science of Fooling the Senses

Magic and Perception: The Art and Science of Fooling the Senses

Robert Friedhoffer

Magic and Perception: The Art and Science of Fooling the Senses

Magic and Perception: The Art and Science of Fooling the Senses

Linda Eisenberg

How to Haunt a House for Halloween

How to Haunt a House for Halloween

Robert Friedhoffer