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Author
Series
Albert Hopper science hero volume 2
Language
English
Appears on list
Description
Professor Albert Hopper, frog and Science Hero, travels with his niece Polly and nephew Tad throughout the solar system, exploring the sun, asteroids and comets, and the planets.
Author
Series
Albert Hopper science hero volume 1
Language
English
Description
Frog--and Science Hero--Professor Albert Hopper travels with his niece Polly and nephew Tad to the center of the Earth, encountering prehistoric cavefrogs, dinosaur fossils, and Yeti on the way.